Canon EOS (Electro-Optical System) is an autofocus single-lens reflex camera (SLR) camera series produced by Canon Inc.. Introduced in 1987 with the Canon EOS 650, all EOS cameras used 35 mm film until October 1996 when the EOS IX was released using the new and short-lived APS film. In 2000, the D30 was announced, as the first digital SLR designed and produced entirely by Canon. Since 2005, all newly announced EOS cameras have used digital image sensors rather than film. The EOS line is still in production as Canon’s current digital SLR (DSLR) range, and, with the 2012 introduction of the Canon EOS M, Canon’s mirrorless interchangeable-lens camera (MILC) system (Source: Wikipedia)

The name “EOS” was chosen for Eos, the Titan goddess of the dawn in Greek mythology and is often pronounced as a word (/ˈiːɒs/), although some spell out the letters, reading it as an initialism.

The EOS emblem was created using Handel Gothic typography.

It competes primarily with the Nikon F series and its successors, as well as autofocus SLR systems from Olympus Corporation, Pentax, Sony/Minolta, and Panasonic/Leica.

At the heart of the system is the EF lens mount, which replaced the previous FD lens mount, which mainly supported only manual-focus lenses.

What is the difference between EOS and DSLR?

Anyone who has been researching Canon digital SLR cameras will notice many of their names have the letters EOS attached to them. For example, EOS 30D, EOS 1D Mark III, EOS Rebel etc. But what does EOS mean exactly?

Many people mistakenly believe that the term EOS stands for some new special feature built into Canon digital SLR cameras. However, as explained above, EOS camera’s have been around for over 25 years and is really nothing new in today’s terms.

DSLR = Digital Single Lens Reflex – a style of camera. A DSLR is a digital SLR, which means any digital camera that allows you to change lenses and has a reflex mirror allowing you to view/focus through the same lens used to take the photo. The mirror must then be flipped up to take the photo.

An EOS camera is Canon’s overall term for both film and digital SLRs. Canon introduced the EOS name, which stands for Electro-Optical System, when it went to auto-focusing for their SLRs.

If you buy a new SLR these days, it will almost certainly be a digital SLR, as almost no film SLRs are being made any more. In fact, Canon is not making any more film Rebel SLRs or even high-end film SLRs anymore

Understand also that as you progress, your lens costs will far exceed the cost of your body. Also, at this time, I only named Nikon and Canon as they totally dominate the SLR market and have the most lenses available, in used, new and third-party. Other SLR makers include Sony, Pentax, Olympus, and Fujifilm (which uses Nikon SLR bodies). It’s an open question whether any of these other companies will remain in the SLR market in the long term, hence my recommendation to stick with Nikon or Canon.

See Canon cameras and/or lenses in our stock.

You may have studied the descriptions of digital SLR technology in this article since you’re considering which DSLR to buy. Because technology changes so rapidly, it’s unlikely that the electronic camera you buy today will be your last. On the other hand, even the least expensive DSLR is a significant investment for most of us, especially when you consider the expense of the lenses and devices you’ll buy. You wish to make the right choice the first time. Digital SLR choice makers often fall under among 5 classifications:

■ Severe professional photographers. These consist of picture enthusiasts and experts who might currently own lenses and accessories coming from a specific system, and who need to maintain their financial investments by choosing, if possible, a DSLR that works with as much of their existing devices as possible.

■ Professionals. Pro professional photographers buy equipment like carpenters purchase routers. They want something that will get the job done and is rugged enough to work dependably in spite of heavy use and mistreatment. They do not necessarily appreciate cost if the equipment will do what’s needed, because their companies or customers are ultimately bearing the cost. Compatibility may be a great idea if a company’s shooters share a pool of specific devices, but a professional picking to switch to a whole brand-new system probably won’t care much if the old stuff needs to fall by the wayside.

■ Well-heeled professional photographers. Lots of DSLR purchasers show a high turnover rate, because they buy equipment mainly for the love of having something new and intriguing. Some actually feel that the only way they will have the ability to take decent (or better) images is to own the really most current equipment. I enjoy letting these folks have their enjoyable, since they are typically a good source of mint utilized equipment for the rest people.

■ Serious newcomers. Numerous DSLRs are sold to new photographers who are buying their very first digital camera or who have actually been utilizing a point-and-shoot video camera design. These buyers do not plan on junking whatever and purchasing into a new system anytime quickly, so they are more likely to examine all the alternatives and select the best DSLR system based on as many elements as possible. Their caution may be why they have actually waited this long to acquire a digital SLR in the first place.

■ Casual newcomers. As rates for DSLRs dropped a lot, I saw a new type of purchaser emerging, those who might have acquired a point-and-shoot video camera at the exact same price point in the past, and now have the concept that a DSLR would be cool to have and/or might offer them with better pictures. A lot of these owners aren’t serious about photography, although they might be severe about getting excellent photos of their household, travels, or activities. A large number of them find that a basic DSLR with its kit lens fits them just great and never ever purchase another lens or device. It could be said that a DSLR is overkill for these casual buyers, however many will wind up very pleased with their purchases, even if they aren’t using all the offered functions.

Questions to Ask Yourself when Buying a Camera

As soon as you choose which category you fall under, you need to make a list of your requirements. What sort of images will you be taking? How typically will you be able to update? What abilities do you need? Ask yourself the following questions to assist determine your genuine requirements.

Just How Much Resolution Do You Required?

This is an essential concern since, at the time I write this, DSLRs are readily available with resolutions from about 10– 12 megapixels to 24 megapixels (and beyond, if you consist of some unique types called medium format cams). A lot more intriguing, not all digital SLRs of a particular resolution produce the exact same outcomes. It’s totally possible to get better photos from a 12 megapixel SLR with a sensor that has low sound and more accurate colours than with a comparable 12 megapixel model with an inferior sensor (even when the differences in lens efficiency is discounted). Looking at resolution in general, you’ll want more megapixels for some types of photography. If you wish to produce prints larger than 8 × 10 inches, you’ll be happier with a video camera having 12– 14 megapixels of resolution or more. If you wish to crop out small areas of an image, you might require a cam with 16– 21 megapixels. On the other hand, if your main application will be taking pictures for display on a websites, or you require thumbnail-sized pictures for ID cards or for a brochure with small illustrations, you might get along simply fine with the lowest-resolution DSLR camera you can find. Keep in mind that your requirements might alter, and you may later be sorry for choosing an electronic camera with lower resolution. Complete Frame or Cropped Frame? Throughout this chapter I’ve pointed out a few of the differences between full-frame sensors and cropped sensors. Your choice between them can be among the most crucial choices you make. Even if you’re brand-new to the digital SLR world, from time to time you’ve heard the term crop factor, and you have actually most likely also heard the term lens multiplier element. Both are deceptive and inaccurate terms used to describe the very same phenomenon: the reality that some electronic cameras (normally the most budget-friendly digital SLRs) provide a field of view that’s smaller and narrower than that produced by certain other (usually a lot more pricey) cams, when fitted with precisely the exact same lens. The picture rather plainly shows the phenomenon at work. The outer rectangular shape, marked 1X, reveals the field of view you may anticipate with a 28mm lens mounted on a “complete frame” (non-cropped) camera, like the Nikon D3-series or Canon 1Ds series. The location marked 1.3 X reveals the field of vision you’d get with that 28mm lens set up on a so called APS-H kind element cam, like the Canon 1D series. The area marked 1.5 X reveals the field of vision you’d get with that 28mm lens installed on an APS-C form element camera that includes practically all other non-Four Thirds /Micro Four Thirds designs. Canon’s non-full-frame electronic cameras, like the 60D and 7D, have a kind aspect of 1.6 X, which is virtually identical and likewise called by the APS-C classification. All 4 Thirds/Micro Four Thirds electronic cameras use a 2X crop aspect, represented by the inner rectangular shape. You can see from the illustration that the 1X performance provides a wider, more extensive view, while each of the inner field of visions is, in contrast, cropped. The cropping impact is produced since the “cropped” sensors are smaller sized than the sensors of the full-frame electronic cameras. These sensing units do not determine 24mm × 36mm; rather, they spec out at roughly 23.6 × 15.8 mm, or about 66.7 percent of the location of a complete frame sensing unit. You can calculate the relative field of view by dividing the focal length of the lens by.667. Hence, a 100mm lens mounted on an APS-C camera has the exact same field of vision as a 150mm lens on a full-frame camera. We human beings tend to perform multiplication operations in our heads more quickly than division, so such field of view comparisons are normally computed using the reciprocal of.667– 1.5– so we can multiply rather. (100/.667=150; 100 × 1.5=150.) This translation is usually helpful just if you’re accustomed to utilizing full-frame video cameras (normally of the film range) and want to know how a familiar lens will carry out on a digital camera. I strongly prefer crop aspect over lens multiplier, since nothing is being increased; a 100mm lens doesn’t “become” a 150mm lens– the depth-of-field and lens aperture remain the very same. Only the field of view is cropped. But crop factor isn’t better, as it implies that the 24 × 36mm frame is “full” and anything else is “less.” I get emails all the time from professional photographers who explain that they own full-frame cams with 36mm × 48mm sensing units (like the Mamiya 645ZD or Hasselblad H3D-39 medium format digitals). By their reckoning, the “half-size” sensors discovered in full-frame cams are “cropped.” Probably a much better term is field of view conversion element, however no one really uses that one. If you’re accustomed to utilizing full-frame film video cameras, you might discover it practical to use the crop aspect “multiplier” to equate a lens’ genuine focal length into the full-frame equivalent, despite the fact that, as I said, absolutely nothing is actually being increased.

How Frequently Do You Want to Update?

Photography is one field occupied by large numbers of techno maniacs who merely need to have the most recent and finest devices at all times. The digital photography world seldom disappoints these device nuts, because newer, more sophisticated designs are introduced every couple of months. If staying on the bleeding edge of technology is essential to you, a digital SLR can’t be a long-lasting financial investment. You’ll have to count on purchasing a brand-new electronic camera every 18 months to two years, since that’s how typically the average vendor takes to replace a current model with a more recent one. Some upgrades are minor ones. Thankfully, the common DSLR replacement cycle is a much longer schedule than you’ll discover in the digital point-and-shoot world, where a particular top of the line camera may be replaced every six months or more frequently. Digital SLRs normally are changed no more frequently than every 12 to 18 months– 12 months for the entry-level models, and 18 months or longer for the intermediate and sophisticated models. On the other hand, perhaps you’re not on a relentless quest for a shiny brand-new gizmo. You just desire excellent pictures. Once you acquire a video camera that gets the job done, you’re not likely to upgrade till you discover there are particular pictures you can’t take because of limitations in your existing devices. You’ll be happy with a cam that does the job for you at a rate you can afford. If your desires are large but your pocketbook is limited, you may wish to downsize your purchase to make those inescapable regular upgrades possible.

Sell or Keep your Devices?

Normally, come upgrade time, your old DSLR will deserve more as a hand-me-down to another user than as a trade-in. That’s why I’m currently eagerly anticipating using my present preferred DSLR as a second or 3rd video camera body when I do update to the next generation. An additional body can be available in convenient. When I leave town on journeys, I usually take one additional body just as a backup. Still, I end up using the backup more than I expected when I mount, say, a telephoto zoom on my “main” video camera and a wide-angle zoom on my backup so I do not have to switch lenses as typically.

What is the secret of fascinating photos? Think about it, I am always asked which camera, lens or setting I used to take this or that photo. Seldom does anyone ask: “How did you come up with this motive?” The subject is always important to me – no matter which camera I use to take my picture. Therefore, I would like to familiarize you with the search for the main subject, one of my most important lessons in composition – what you really want to put in scene. Because this way your photos will be even better!

Who is the main actor in your photo?

Shortly after buying my first SLR camera, I bought a cool 10-20 mm wide-angle lens from Sigma. Wow what a dimension. Now I could get the whole world in one photo. But when I look back today, this visual excess has overwhelmed me. What should I focus on? Photos are like a good film: there is a leading actor. The audience will recognize it, and everything in your composition will help to set it perfectly in scene: light, perspective, focus, design elements and, last but not least, the plot.

Make what is unique in your photo and in the situation visible – go very close and throw out everything that is unimportant. Here I only photographed the reflection of the tree.

What do you see that fascinates you as a motive?

Who should be the main protagonist of your photo? I would like to share with you some tips and techniques that will help you sharpen your focus on the main actor. But the first impulse has to come from you. Who or what do you want to show – how and in what way?

Typical challenges in our subject search

• If the subject is too small, the viewer of your photos may not recognize it as the main subject.
• Are there too many (unimportant) things in the picture? Oh dear, then the meaning of your photo may be lost.

Do whatever you can to find your subject. Your eyes and your brain don’t make it easy for you. They are the perfect combination for an exciting deception. Because if you see the subject, your head takes over the image processing without being asked. Everything that is not important is cut away. But your camera can’t! Your eyepiece is merciless. It shows everything that you depict in the frame and in the four corners of your photo. Stay tuned and keep practicing the technique!

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Here I have 5 tips for you to find your main subject

5 tips to find your main subject

1. Find what fascinates you

What made you stop before considering taking this picture? That should become your main subject. A great light situation? An exciting face?

• How can you show the fascination in the picture?

Is the subject clear enough in the picture? Is something disturbing the effect? From now on your mission is: Make the uniqueness of the situation visible!

• Separate yourself from the unimportant

Before you doubt your technique or your inability, there is usually too much of what you have in the photo. We’re still learning how to clean up your photo. Because less is more and exactly the little and the emptiness emphasizes your main motive.

• What can you show and what not?

If the subject is personal – the mood of the evening or the pet that means a lot to you – that’s okay. But the connection to you cannot always be shown in the photo. Be critical, think about the effect when a stranger looks at your photos. Good photos work without explanation.

• Have perseverance

Many of my photos that didn’t turn out so well were just not good because of my impatience. Stay tuned to your idea and your motive. Take one more photo and try a new perspective. Don’t give up so quickly!

Discover the best used Sony E-mount lenses for video and content creation. From budget-friendly zooms to pro-level primes, find out what to look for and which models offer the best value in 2025.

Used Sony E-Mount Lenses for Video and Content Creation

As content creation continues to evolve, so does the demand for high-quality, reliable gear that fits within a creator’s budget. For those using Sony mirrorless cameras, particularly the Alpha and FX lines, Sony’s E-mount lens ecosystem offers a wealth of options—many of which can be found in excellent condition on the used market. Whether you’re shooting YouTube videos, TikToks, short films, or client work, investing in used Sony E-mount lenses can be a smart way to level up your production without overspending.

In this article, we’ll explore the best types of used Sony E-mount lenses for video and content creation, what to look for when buying used, and some top recommendations that still perform like new in 2025.

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Why Buy Used Lenses for Video Work?

Buying used lenses isn’t just about saving money—although that’s a huge benefit. It also gives creators access to higher-end glass that might be out of reach when purchased brand new. With careful inspection and reputable sellers, used lenses can deliver the same optical performance as new ones.

Benefits of buying used include:

• Lower upfront cost
• Access to discontinued or rare models
• Proven performance reviews from real users
• Minimal depreciation if resold later

For video work, where budget-conscious gear upgrades are frequent, the value proposition of used lenses is hard to beat.

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What to Look for in Video-Focused E-Mount Lenses

While photo lenses and video lenses share many similarities, there are a few specific traits to prioritize if you’re primarily creating video content:

1. Quiet and Smooth Autofocus

Autofocus motors should be fast, smooth, and silent to avoid noisy footage or focus hunting during recording. Look for lenses with Sony’s linear or stepping motors.

2. Wide Aperture

Lenses with f/1.4 to f/2.8 apertures allow better control over depth of field and perform better in low-light settings—ideal for interviews, talking heads, or cinematic b-roll.

3. Minimal Focus Breathing

Focus breathing causes the image to subtly zoom when shifting focus, which can be distracting in video. Some Sony and Sigma lenses are optimized to reduce this effect.

4. Stabilization (if needed)

Optical SteadyShot (OSS) in-lens stabilization can be beneficial for handheld shooting, although many Sony bodies also feature in-body image stabilization (IBIS).

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Top Used Sony E-Mount Lenses for Video and Content Creators

Here are some standout used lenses that remain excellent for content creation in 2025:

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1. Sony E 16–55mm f/2.8 G (APS-C)

Best for: Vloggers and hybrid shooters
This G-series zoom is an excellent pick for APS-C Sony cameras like the a6400 or FX30. With a constant f/2.8 aperture and fast, silent autofocus, it’s ideal for handheld shooting, walk-and-talk vlogs, and general-purpose content.

• Pros: Sharp, well-built, fast aperture, weather-sealed
• Cons: No optical stabilization

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2. Sony FE 24mm f/1.4 GM (Full-frame)

Best for: Wide-angle talking head videos and b-roll
The 24mm focal length is ideal for vloggers and YouTubers who shoot in tight indoor spaces. This G Master lens is known for stunning sharpness and creamy bokeh.

• Pros: Lightweight for a GM lens, excellent low-light performance
• Cons: Premium price, even used

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3. Sigma 18–50mm f/2.8 DC DN (APS-C)

Best for: Run-and-gun creators on a budget
This compact zoom is one of the best third-party APS-C lenses for video. It’s fast, sharp, and covers a very useful range for creators using a6400, FX30, or ZV-E10.

• Pros: Affordable used, smooth AF, compact
• Cons: APS-C only

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4. Sony FE 35mm f/1.8 (Full-frame or APS-C)

Best for: Interviews, product shots, and cinematic b-roll
The 35mm focal length is extremely versatile. This lens is small, fast, and excellent for a wide range of video applications.

• Pros: Lightweight, sharp wide open, quiet AF
• Cons: Not a G Master, but still professional-grade

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5. Tamron 28–75mm f/2.8 Di III RXD (Full-frame)

Best for: Documentary-style or handheld shooting
A popular third-party zoom that works great on Sony full-frame cameras, this Tamron lens offers performance close to the Sony 24–70mm f/2.8 GM at a fraction of the price, especially when bought used.

• Pros: Great value, constant f/2.8, decent autofocus
• Cons: Focus breathing more noticeable than G Master lenses

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Where to Buy Used E-Mount Lenses

When shopping for used lenses, stick to reputable sellers with clear return policies and warranty options. Trusted marketplaces include:

• KEH Camera
• MPB
• B&H Used Department
• Adorama Used Gear
• Local camera stores or certified eBay sellers

Always check the condition (look for terms like “Excellent” or “Like New”) and verify that the lens has been tested for focus, aperture, and stabilization functionality.

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Final Thoughts: Is Buying Used E-Mount Lenses Worth It for Creators?

Absolutely. In 2025, used Sony E-mount lenses continue to provide tremendous value for creators of all levels. Whether you’re a solo vlogger, a freelance videographer, or running a growing content channel, the used market gives you access to pro-level gear at manageable prices.

By carefully selecting the right lens for your shooting style—and buying from trusted sources—you can build a powerful video setup without overspending. And since lenses hold their value better than camera bodies, it’s an investment that can pay off creatively and financially in the long run.

Confused about lens mount compatibility? This guide explains flange distance, adapter types, and key factors to check before buying used lenses, ensuring they fit and function with your camera system.

Lens Mount Compatibility: What You Need to Know Before Buying

When it comes to building a camera system, one of the most important—but often overlooked—considerations is lens mount compatibility. You might find an excellent deal on a used lens or dream of using vintage glass with your modern camera, but if the mount isn’t compatible, you could end up with an expensive paperweight—or face costly and cumbersome workarounds.

Lens mount compatibility determines whether a lens will physically and electronically connect to your camera body. With so many brands, mount types, and adapters available, understanding the basics of lens mounts is essential before making a purchase.

In this guide, we’ll break down everything you need to know about lens mount compatibility, including mount types, adapting lenses across systems, and tips for avoiding costly mistakes.

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What is a Lens Mount?

A lens mount is the interface where a lens attaches to a camera body. It ensures a secure physical connection and—on modern lenses—enables communication between the lens and the camera for functions like autofocus, aperture control, and image stabilization.

Lens mounts differ in:

• Physical dimensions (diameter, flange distance)
• Electronic communication protocols
• Mechanical locking mechanisms

Each camera manufacturer typically has its proprietary mount system, although some third-party lens makers produce lenses in multiple mount options.

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Flange Distance: The Key to Compatibility

One critical specification is flange focal distance (FFD)—the distance from the lens mount to the camera sensor.

• Short flange distances allow more flexibility for adapting lenses.
• Long flange distances limit adaptability, especially to mirrorless systems.

For example:

• DSLRs (like Canon EF or Nikon F) have longer flange distances.
• Mirrorless cameras (like Sony E, Canon RF, Nikon Z, Fujifilm X, Micro Four Thirds) have shorter flange distances.

Short flange distance cameras can adapt lenses with longer flange distances using simple mechanical adapters.

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Common Lens Mount Systems

Canon EF and EF-S (DSLR)

• EF: Full-frame DSLRs.
• EF-S: Crop-sensor (APS-C) DSLRs.
• EF lenses work on EF-S bodies, but EF-S lenses don’t mount on full-frame EF bodies.
• Not natively compatible with Canon’s mirrorless RF mount without an adapter.

Canon RF (Mirrorless)

• For Canon’s full-frame mirrorless cameras (EOS R series).
• Adapters allow use of EF and EF-S lenses.

Nikon F (DSLR)

• Long-standing mount used for decades.
• Compatible with many older Nikon lenses (AI, AI-S), but some limitations with entry-level bodies (no in-body focus motor).

Nikon Z (Mirrorless)

• For Nikon’s full-frame and APS-C mirrorless cameras.
• FTZ adapters allow use of Nikon F-mount lenses with full functionality on higher-end Z bodies.

Sony E-Mount (Mirrorless)

• E-mount is used across Sony’s APS-C and full-frame mirrorless cameras.
• Flexible for adapting third-party lenses due to short flange distance.

Fujifilm X-Mount (Mirrorless)

• For Fujifilm’s APS-C mirrorless cameras.
• Lenses from other mounts require adapters; no native full-frame X-mount lenses.

Micro Four Thirds (MFT)

• Shared by Olympus and Panasonic.
• Smaller sensor size with 2x crop factor.
• Very adaptable to legacy manual focus lenses.

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Adapting Lenses: Mechanical vs Electronic Adapters

Mechanical Adapters

• Simple metal rings with no electronic contacts.
• Perfect for adapting manual focus lenses.
• Focus and aperture are controlled manually.
• Ideal for vintage lenses (e.g., M42, Leica M, Canon FD).

Electronic Adapters

• Enable communication between lens and camera body.
• Allow autofocus, aperture control, EXIF data transfer, and image stabilization (if supported).
• Quality varies: some brands (e.g., Metabones, Sigma MC-11) produce reliable adapters; cheap no-brand adapters can be hit-or-miss.

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Adapting DSLR Lenses to Mirrorless Bodies

One of the major advantages of mirrorless cameras is their adaptability. For example:

• Canon EF lenses to Canon RF bodies (using Canon’s official EF-RF adapter).
• Nikon F lenses to Nikon Z bodies (via Nikon FTZ adapter).
• Canon EF or Nikon F lenses to Sony E-Mount bodies (via Metabones or Sigma MC-11 adapters).

Adapting DSLR lenses to mirrorless bodies generally works well because mirrorless cameras have a shorter flange distance, making room for adapters.

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Limitations When Adapting Lenses

1. Autofocus Speed & Accuracy: Adapting DSLR autofocus lenses to mirrorless can result in slower or less accurate autofocus.
2. Electronic Features: Some features like lens-based image stabilization, aperture control, and EXIF data may not work with cheap adapters.
3. Manual Focus Only: When adapting vintage lenses (e.g., Canon FD to Sony E-mount), you’ll be limited to manual focus and manual aperture control.
4. Infinity Focus Issues: Poorly made adapters may prevent the lens from focusing to infinity.
5. Vignetting or Sensor Coverage: Adapting full-frame lenses to crop sensors works fine, but using APS-C lenses on full-frame bodies may cause vignetting.

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Lens Mount Compatibility: What to Double-Check Before Buying

1. Camera Body Mount Type

• Know whether your camera is a DSLR or mirrorless, full-frame or APS-C.
• Example: A Nikon F-mount lens won’t fit a Nikon Z body without an adapter.

2. Lens Mount Type

• Identify the lens mount of the used lens you’re interested in.
• Example: Canon FD (manual focus) lenses require an adapter to mount on modern Canon EF bodies or mirrorless cameras.

3. Adapter Availability & Cost

• Ensure there’s a reliable adapter for the lens-camera combination.
• Budget for high-quality adapters (brands like Metabones, Novoflex, Viltrox).

4. Functionality Expectations

• Are you okay with manual focus only?
• Do you need autofocus and aperture control?
• Will you lose image stabilization?

5. Crop Factor Considerations

• Using a full-frame lens on an APS-C body results in a narrower field of view.
• Example: A 50mm lens becomes equivalent to a 75mm on a 1.5x crop sensor.

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Popular Mount Combinations for Adaptation

• Canon FD to Sony E-Mount (Manual Focus)
• Nikon AI-S to Fuji X or Sony E-Mount
• Canon EF to Sony E-Mount (with Metabones Speedbooster for full-frame equivalent)
• M42 Screw Mount to Almost Any Mirrorless Camera

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Future-Proofing Your Lens Purchases

If you plan to upgrade your camera body in the future, consider lenses that will still be compatible:

• Lenses with a longer flange distance can be adapted to mirrorless cameras.
• Modern mirrorless lenses (RF, Z, E-Mount) are less likely to be compatible with DSLR bodies.
• Investing in high-quality manual focus lenses (e.g., Leica M, Zeiss, Voigtländer) ensures long-term versatility across systems.

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Conclusion

Lens mount compatibility is a critical yet often overlooked factor when buying lenses—especially in the used market. Understanding flange distances, mount types, and the pros and cons of lens adapters can save you time, money, and frustration.

Before hitting that “Buy Now” button, make sure you’ve confirmed whether the lens will fit your camera natively or if an adapter is needed. More importantly, ensure you’re aware of any functionality trade-offs (like losing autofocus or stabilization).

A little research goes a long way. With the right knowledge, you can confidently expand your photography kit with used lenses that work seamlessly with your camera system—unlocking creative possibilities while staying on budget.

For different perspectives and composition, it can be useful to try different types of camera lenses. Ever get confused when it comes to the many different types of camera lenses?

There are two main types camera lenses are zoom lenses and prime lenses:

• Zoom lens – it is a lens which can go from wide angle to telephoto range or from telephoto to high telephoto; the focal length can change. Ideal by most travelers because one or two lenses will give an entire range that they will ever need. However, the image quality is often compromised by this convenience.
• Prime lens (primary focal length, unifocal lens or FFL) – is a fixed focal length photographic lens, typically with a maximum aperture from f2.8 to f1.2. Prime lenses come in a wide range of focal lengths from wide angles through to the very longest of tele-photo lenses. They have a larger maximum aperture, which enables quicker shutter speeds (faster) than zoom lenses. Read more on Wikipedia

There are many possible lens choices and all will give you a different and distinct image. The lens choice depends on the environment and on the creativity of the photographer in selecting the right lens to capture the vision of the world the way he or she sees it, or wants to present it.

Here are some of the main lens types:

• Standard lens (normal lens) – a similar angle of view to the human eye, giving photos a natural feel. They are general-purpose lenses, and can be used to photograph everything from close-up portraits to landscapes. A standard lens will make the distance between near and far objects look ‘normal’. For a 35mm film camera or a full-frame DSLR, the 50mm lens is considered standard.
• Telephoto lens – long-focus lens; long focal length lenses. The angle of view of approx. 20°. This lens class is suited for capturing distant motives up close, e.g., sports, nature or theatrical photography.
• Wide angle lens – camera lens with a focal length of less than 35mm is considered wide angle (useful in architectural, interior and landscape photography where the photographer may not be able to move farther from the scene to photograph it). Angle of view greater than 55°. Wide-angle lenses come in both fixed-focal-length and zoom varieties.
• Also, there are ultra-wide angle lenses (fisheye lenses). They are small, ultra-wide, and show a distorted, spherical view of the world, most evident in the curved, outer corners of the photo.
• Macro Lens – a lens suitable for taking photographs unusually close to the subject. Designed for photographing small subjects at very close distances. They can focus much nearer than normal lenses, allowing you to fill the frame with your subject and capture more details. Macro lenses normally have a fixed focal length (prime lenses). There are zoom macro lenses available but they are low quality and they have low magnification ratio. Read more about macro lenses

Additional devices can be mounted on lenses to change the image quality, such as different filters. Also, tele-converters can be used between lens and camera and to increase the focal length of the mounted lens.

Popular focal lengths

• 12 to 21mm: Ultra-Wide — usually used at very close subject distances to produce a perspective that provides a dramatic, often extreme image that distorts a scene’s natural proportions.
• 24 to 35mm: Wide — capture a wider field of view than a standard lens, at shorter distances, the perspective can show distortion.
• 50 mm: Standard — a focal length near the 44mm image diagonal and a perspective similar to human vision.
• 85 mm: Portrait — short telephoto lens that accommodates a longer subject to camera distance for pleasing perspective effects and useful image framing.
• 135 mm: Telephoto — used, for example, by action and sports photographers to capture far away objects.
• 200 to 500 mm: Super Telephoto — specialized, bulky lenses typically used in sports, action, and wildlife photography.

Among the key component of a digital video camera is its viewfinder. With a DSLR, the viewfinder is, together with lens interchangeability, among the distinguishing features between the DSLR and non-DSLR cameras. Certainly, other digital cams offer a type of through-the-lens watching by showing the present sensing unit image on an LCD. But, an LCD show is hardly the exact same thing as a huge, intense SLR view in terms of structure, ease of focus, the amount of details provided, or viewing convenience.

View on the back-panel LCD show

These seeing panels, which operate like miniature laptop computer display screens, reveal practically the exact image seen by the sensing unit. The LCDs procedure approximately 2.7 to 3 inches diagonally, and usually show 98 percent or more of the picture view seen by the lens. An LCD may be difficult to view in intense light. Point-and-shoot digital cams use the LCD show to show the image prior to the picture is taken, and to examine the image after the picture has actually been made. A few of these have no optical viewfinder at all, so the only way to compose a shot is on the LCD. In a DSLR, the back-panel LCD is utilized for examining photos that have actually been taken and for previewing using the so-called Live View functions, and for seeing motion pictures as they are taken.

View through an optical viewfinder window

Some non-SLR digital cams have a glass direct view system called an optical viewfinder that you can utilize to frame your image. Optical viewfinders can be basic window-like devices (with low-end, fixed zoom digital cameras) or more advanced systems that zoom in and out to approximately match the view that the sensor sees. The advantage of the optical viewfinder is that you can see the subject at all times (with other systems the view might be blanked out throughout the direct exposure). Optical systems might be brighter than electronic watching, too. A huge drawback is that an optical viewfinder does not see precisely what the sensing unit does, so you might end up cutting off someone’s head or otherwise do some unintentional cutting of your topic.

View through an electronic viewfinder (EVF).

The EVF operates like a little tv screen inside the digital electronic camera. You can view an image that closely corresponds to what the sensing unit sees, and it is much easier to view than the LCD show, but doesn’t have almost the quality of an SLR viewfinder. EVF electronic cameras are generally more compact than DSLRs, and are offered both with interchangeable lenses (such as the Olympus and Panasonic Micro 4 Thirds cameras, or Sony NEX designs) or with integrated superzoom lenses that stretch from 12X to 18X or more (hence removing a few of the requirement for interchangeable lenses).

View an optical image through the electronic camera lens.

Another sort of optical viewfinder is the through-the-lens viewing provided by the SLR camera. With such electronic cameras, an additional element, typically a mirror, reflects light from the taking lens up through an optical system for direct watching. The mirror shows essentially all the illuminate to the viewfinder, except for some lighting that might be siphoned off for usage by the automatic direct exposure and focus mechanisms. The mirror swings out of the way throughout a direct exposure to allow the light to reach the sensing unit rather. Sometimes, a beam splitting gadget is used instead. A beam splitter does what you expect: It divides the beam, reflecting part to the viewfinder and permitting the remainder of the light to strike the sensor. As discussed earlier, an optical viewfinder’s image showed from the mirror is reversed, of course, so it is bounced around a bit more within the camera to produce an image in the viewfinder window that is oriented properly delegated right and vertically. Some digital cams use a pentaprism, which is a solid piece of glass and generates the brightest, most accurate image. Others utilize a pentamirror system, lighter in weight and more affordable to produce, but which provides you an image that is a little less fantastic than that developed by a pentaprism. Olympus has utilized a swinging sideways mirror viewfinder system it calls a TTL Optical Porro Finder on a few of its DSLRs, which has the advantage of permitting a much squatter profile for the video camera, due to the fact that the huge lump of a pentaprism/pentamirror need not occupy the top of the electronic camera. There are numerous other essential elements of SLR viewfinders that you require to keep in mind:.

Live View mode.

The majority of true DSLRs supply no LCD sneak peek other than in Live View mode. Because of the way digital SLRs operate it is not possible to see the image on the back panel LCD prior to the picture is taken. Absence of live sneak peek does not seem like much of an issue initially– after all, the optical view is brighter, easier to focus, and frequently much larger than an LCD sneak peek– until you go to take an infrared image or other image utilizing a filter that reduces the exposure of the through-the-lens view, or obscures it entirely. With an SLR, you’re shooting blind, so Live View can be beneficial when you want to see the image that the sensing unit sees, before shooting.

Vision correction.

All DSLRs have diopter correction to permit near/far sightedness. However, if you have other vision problems that need you to wear glasses while making up pictures, make certain your digital camera lets you see the entire image with your spectacles pushed up against the viewing window. Often the style of the viewfinder, including rubber bezels around the frame, can restrict visibility.

Eye point.

The range you can move your eye away from the viewfinder and still see all of the image is called the eye point, and it is essential to more than simply eyeglass users, as explained above. For example, when shooting sports, you might wish to use your other eye to sneak peek the action so you’ll know when your subjects will move into the frame. Video cameras that permit seeing the full image frame even when the eye isn’t pressed up tightly to the window make it easy to do this. In the past, makers of SLR cams have even offered “extended eye point” devices for sports photographers and others.

Zoom.

The relative size of the viewfinder image impacts your ability to see all the information in the frame as you compose an image. It’s not something you might consider, but if you compare DSLRs side by side, you’ll see that some provide a larger through-the-lens view than others. Bigger is constantly better, however it is likely to cost more, too. Working with viewfinders will show up once again a couple of times later in this book, however if you keep in mind the fundamental information provided in this chapter, you’ll understand most of what you require to know.

Beetles and crawlers, flowers and leaves, everywhere and in every season: the world of small things fascinates with its incredible wealth of colors and shapes. The fascination of macro photography is due, among other things, to the fact that we cannot perceive the tiny natural wonders with the naked eye, or only to a very limited extent. Fortunately, photography offers a variety of optical options. We have some tips for special macro photos.

1. Calm background, brilliant foreground

The more reduced and plain the background, the clearer the main motif appears.

Background plays an important role in macro photography. Small, colorful, sharply depicted objects such as insects and butterflies are particularly effective in front of a uniformly colored, blurred surface. The photographic “laws of nature” help: A long or large focal length and an open aperture ensure perfect blurring in the background. Speaking of lenses: The best close-up images are created with a special macro lens, for example with a 100 millimeter focal length.

2. Thin sections, bright images

Light from behind makes thin slices of onions, citrus fruits and other fruits and vegetables shine wonderfully.

Fruit, vegetables and Co. can be wonderfully staged as macro motifs. The basic principle is simple: Everything that can be cut very thinly and which then has a certain degree of light permeability is suitable for these recordings. Examples are the onion and especially citrus fruits like lemons and oranges. In addition to a tripod, all you need is a surface that is illuminated from below to place the panes on – for example a glass table. Incidentally, such images are also possible with high-quality smartphones.

3. Optical accents, drop by drop

Drops of water on a colored leaf create an interesting “structure on the structure”.

Drops of water bring life to every macro photo and make the surfaces of leaves and flowers that are already interesting in themselves appear even more interesting. Because the drops act like small magnifying glasses that partially enlarge the leaf structure and thus provide an additional image layer. You can take such macro pictures outdoors as well as easily stage them yourself at home. A lamp and, if necessary, a professional brightener in the form of a photo reflector are usually sufficient for lighting.

4. Action photos with butterfly, bee and Co.

Photographing insects in flight is not easy, but practice makes perfect. Just experimenting is a lot of fun.

A butterfly or a bumblebee on the flower – this classic photo can often be seen. It is more exciting to photograph the small flying objects in action. You definitely need a telephoto lens for this. The autofocus should be set to the so-called tracking mode, in which the focus adjustment constantly readjusts the subject. In addition, set the exposure time to at least 1 / 2000th of a second or less. And now it’s time to go out into the garden, park or forest: there you will find what you need for a great macro action shot – a small, colorful, flying main subject. We wish you every success.

Discover the best used Sigma Art lenses to buy in 2025. From sharp primes to versatile zooms, find out which models offer top-tier performance and unbeatable value for photographers on a budget.

Best Used Sigma Art Lenses You Can Buy in 2025

Sigma’s Art series has established itself as a hallmark of optical excellence—offering high-resolution sharpness, smooth bokeh, and rock-solid build quality. For budget-conscious photographers and videographers, buying these lenses pre‑owned offers tremendous value. Despite the passage of time, many Sigma Art models continue to deliver top-tier performance in 2025. Below, we’ve rounded up the best used Sigma Art lenses you can reliably invest in today.

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1. Sigma 35mm f/1.4 DG HSM Art

A groundbreaking lens when introduced—this classic 35mm prime made Sigma synonymous with premium independent optics.

• Performance: Delivering exceptional sharpness even wide open, it rivals the best offerings from Canon and Nikon. WikipediaRetouching Labs
• Versatility: Its natural field of view is ideal for street, documentary, and travel photography.
• Why Used Makes Sense: It’s widely available, reliable, and often sells used at a fraction of its original price.

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2. Sigma 50mm f/1.4 DG HSM Art

A portrait and general-purpose prime favorite across many systems.

• Image Quality: Offers crisp detail and creamy bokeh, ideal for portraits and low-light shooting. cameraworld.co.ukWIRED
• Build: Solid construction with reliable autofocus.
• Benefits of Buying Used: Significant savings for a lens that still holds its own among modern alternatives.

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3. Sigma 85mm f/1.4 DG HSM Art

Regarded as one of the sharpest portrait lenses available.

• Optics: Smooth background blur and sharp subject rendition—especially on high-megapixel systems. cameraworld.co.ukColor Experts International
• Usage: Exceptional for studio, portrait, and event photography.
• Used Market Advantage: You can access its premium rendering without paying full price.

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4. Sigma 24‑70mm f/2.8 DG OS HSM Art

A professional-grade all-around zoom lens favored by event and wedding photographers.

• Features: Dust/splash-proof design, optical stabilization, and consistent f/2.8 across the zoom range. cameraworld.co.ukRetouching LabsHampshire Prints
• Why Used Works: Performance holds up well and you’ll save considerably off new retail.

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5. Sigma 14‑24mm f/2.8 DG HSM Art

One of the go-to ultra-wide zooms for landscape, architecture, and night sky work.

• Strengths: Edge-to-edge sharpness and minimal distortion. Retouching LabsPhotography Project
• Used Lens Market: Prized for its performance, used copies offer immense value to wide-angle shooters.

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6. Sigma 20mm f/1.4 DG HSM Art

A unique wide-angle prime with a super-fast aperture.

• Optical Advantages: Wide f/1.4 allows beautiful depth of field control even at 20mm. cameraworld.co.ukWikipedia
• Ideal For: Astrophotography, environmental portraits, and night work.
• Buying Used: Dramatic edge in cost-effectiveness versus new hardware.

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7. Sigma 135mm f/1.8 DG HSM Art

A rare semi-telephoto prime with ultra-fast aperture—made for stunning portraits.

• Image Quality: Generous bokeh and lovely compression, with minimal distortion. Become better creators — together.
• Used Value: Expensive new, but used copies represent the best value for high-end optics.

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8. Sigma 24mm f/1.4 DG HSM Art

A fast wide-angle prime often praised for cinematic rendering.

• Performance: Excellent sharpness with smooth out-of-focus areas. Great for landscapes, video, and architecture. WikipediaPhotography Project
• Used Purchase Benefits: Get excellent glass at much lower cost.

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Real User Perspective

One Reddit user shared their experience with the Sigma 18‑35mm f/1.8 Art (for APS‑C systems), capturing low-light shots better than they anticipated — “I absolutely love it” despite its heft. Reddit

Such comments highlight how these lenses retain relevance—and why used versions are still in demand.

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Why Sigma Art Lenses Shine as Used Investments

• Superior Optics: Exceptional sharpness, advanced glass, and wide apertures deliver standout image quality. Retouching Labs
• Build Quality: Many Art lenses use premium materials and solid construction that endure over time.
• Firmware & Support: Sigma’s USB dock allows firmware updates and focus tweaks even for used copies (where available). Wikipedia
• Cross-Mount Compatibility: Sigma Art lenses are available for multiple mounts (Canon, Nikon, Sony, L‑mount), increasing resale/demand.

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Final Thoughts—Maximizing Value in 2025

If you’re looking to level up your kit affordably in 2025, these are the top used Sigma Art lenses worth prioritizing:

• Primes: 35mm f/1.4, 50mm f/1.4, 85mm f/1.4
• Zooms & Specialty: 24‑70mm f/2.8, 14‑24mm f/2.8, 20mm f/1.4, 135mm f/1.8, 24mm f/1.4

Ensure you buy from reputable sellers with return policies—and enjoy premium image quality for less.

Buying a used manual focus lens? This guide covers what to inspect—from focus rings and aperture blades to lens optics and mount condition—so you can avoid costly mistakes and get the best value.

What to Look for When Buying a Used Manual Focus Lens

In the era of lightning-fast autofocus systems and high-tech digital lenses, manual focus lenses might seem like a thing of the past. But for many photographers, especially enthusiasts and artists, manual focus lenses are a treasure trove of craftsmanship, optical character, and tactile shooting experience. Whether you’re interested in vintage glass for its unique rendering or modern manual lenses for precision control, buying used is an excellent way to expand your gear without spending a fortune.

However, buying a used manual focus lens is not as simple as grabbing the first good deal you see. Unlike autofocus lenses, which rely on motors and electronics, manual focus lenses depend entirely on the precision of their mechanical parts and optical integrity. This makes inspecting them thoroughly even more important.

In this article, we’ll guide you through what to look for when buying a used manual focus lens, so you can avoid costly mistakes and ensure you’re getting a reliable, high-quality lens that enhances your photography.

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Why Manual Focus Lenses Are Still Worth Buying

Before diving into inspection tips, let’s quickly revisit why manual focus lenses still attract so much attention:

• Superior Build Quality: Many manual lenses, especially vintage models, are constructed with durable metal parts designed to last decades.
• Unique Optical Character: Older lenses often render images with distinct colors, flares, and bokeh that modern lenses can’t replicate.
• Budget-Friendly: High-quality used manual lenses are often far cheaper than their autofocus counterparts.
• Creative Control: Manual focusing encourages a more deliberate shooting style, which can be a creative advantage.
• Adaptability: Manual lenses can easily be adapted to modern mirrorless systems, making them versatile tools even today.

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Essential Factors to Check When Buying a Used Manual Focus Lens

1. Physical Condition of the Lens Body

Start by inspecting the exterior barrel of the lens.

• Check for Dents, Cracks, or Heavy Scratches: While minor scuffs are expected, deep dents or cracks can indicate serious impacts that may have misaligned internal elements.
• Loose or Missing Screws: Examine all screws and fittings to ensure they’re intact and not signs of a careless repair.
• Check Mount Threads/Contacts: Ensure the lens mount is not stripped, bent, or excessively worn. A poor fit can cause mounting issues on your camera body.

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2. Focus Ring Operation

Since you’ll be focusing manually, the focus ring’s performance is critical.

• Smoothness: Rotate the focus ring slowly from end to end. It should feel smooth, without stiffness, grinding, or uneven resistance.
• Consistency: Avoid lenses where the focus ring feels loose, wobbly, or has “dead zones” where the focus doesn’t respond.
• Hard Stops: Check that the focus ring stops precisely at minimum focusing distance and infinity without overshooting.

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3. Aperture Ring Functionality

• Smooth Clicks: The aperture ring should click firmly into each stop with consistent resistance.
• De-clicked Aperture (if applicable): Some lenses are designed for video and may have a smooth, stepless aperture—verify this is intentional.
• Blade Movement: Move the aperture ring while looking through the lens to ensure the blades open and close uniformly.
• Oil-Free Blades: Shine a light through the lens and look for oil or stickiness on the aperture blades, which can cause them to stick and malfunction.

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4. Inspecting Lens Elements (Front & Rear)

• Surface Scratches: Tiny cleaning marks or light scratches on the glass are often cosmetic and won’t affect image quality, but deep scratches are best avoided.
• Lens Coating Condition: Ensure the anti-reflective coatings are intact; patches of wear can increase flare and reduce contrast.
• Internal Haze: Check for foggy or cloudy areas inside the lens, which can severely impact image clarity.
• Fungus: Look for web-like patterns of fungus, especially near the edges of lens elements. Minor fungus might be manageable, but severe cases can damage lens coatings permanently.
• Balsam Separation: If you see rainbow-colored patterns or bubbles between elements, that’s a sign of cement separation, which is difficult to repair and affects image quality.

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5. Internal Dust & Debris

• A few dust particles inside a lens are normal, even in new lenses.
• Large dust particles, hair, or floating debris can affect image contrast.
• Excessive internal dust could also be a sign the lens was stored improperly, increasing the risk of fungus or haze.

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6. Lens Mount & Compatibility

• Mount Type: Confirm the lens mount is compatible with your camera system or check if a reliable adapter is available.
• Mount Integrity: Inspect the lens mount for any signs of damage, wear, or loose fitting.
• Adapter Fit: If possible, test the lens with the adapter you’ll be using to ensure a secure and wobble-free fit.

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7. Test Image Quality (If Possible)

If you can mount the lens on a camera:

• Test Focusing Accuracy: Focus at both close distances and infinity to see if the image snaps into sharp focus.
• Check for Sharpness: Shoot at different apertures, especially wide open, and check sharpness across the frame.
• Look at Bokeh Rendering: See how the lens renders out-of-focus areas—many manual lenses are known for their distinctive bokeh.
• Test Flare & Contrast: Point the lens towards a bright light source to assess flare resistance and contrast handling.

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8. Known Issues of Specific Lens Models

Some manual lenses are prone to certain design quirks or recurring issues. Before purchasing:

• Research forums, user reviews, and technical resources about the specific lens.
• Look for common complaints such as weak construction points, aperture blade issues, or known optical flaws.
  This knowledge can help you identify red flags during your inspection.

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9. Assessing the Lens’s History

• Ask the Seller About Storage Conditions: Lenses stored in humid environments are more likely to develop fungus.
• Frequency of Use: A frequently used lens isn’t necessarily bad but should show signs of good maintenance.
• Original Accessories: Presence of original caps, hoods, or cases often indicates a careful owner.

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10. Market Price Research

Do a thorough price comparison across:

• eBay sold listings
• Online camera stores (KEH, B&H Used Department)
• Local photography groups and forums
  Avoid deals that are “too good to be true”—they usually are.

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Red Flags to Watch Out For

• Fungus or haze inside the lens.
• Stiff or grinding focus ring.
• Sticky aperture blades or oily residues.
• Deep scratches on front or rear elements.
• Loose or bent mounts.
• Sellers unwilling to provide detailed photos or answer questions.

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Best Types of Manual Focus Lenses to Buy Used

• Vintage Classics: Canon FD, Minolta Rokkor, Pentax Takumar, Nikon AI-S lenses.
• Modern Manual Primes: Voigtländer Nokton, Zeiss Loxia, Samyang/Rokinon MF lenses.
• Specialty Lenses: Helios 44-2 (famous for swirly bokeh), Meyer-Optik Trioplan (soap-bubble bokeh).

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Conclusion

Buying a used manual focus lens can be incredibly rewarding, offering access to beautifully crafted optics with distinct character. However, it requires a careful and informed approach. By thoroughly inspecting the physical condition, mechanical operation, and optical integrity, you can avoid costly repairs and ensure you’re investing in a lens that delivers both reliability and artistic flair.

Take your time, do your research, and don’t hesitate to ask questions. When you find a gem of a manual focus lens in great condition, it will serve you for years to come—and likely at a fraction of the cost of modern autofocus lenses.

This article is focusing on common Canon fit photography terms, acronyms, & abbreviations, which are used on Canon lenses. In addition other brands as well, such as Sigma and Tamron, that can be used on Canon digital cameras.

Common Canon Abbreviations

SLR – single-lens reflex camera – typically uses a mirror and prism system (hence “reflex” from the mirror’s reflection) that permits the photographer to view through the lens and see exactly what will be captured.

Digital SLR or DSLR – a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film.

Canon FL lens mount – FL fit was before 1964.

Canon FD lens mount FD fit was before 1987.

EF mount was introduced in 1987.

EF – electronic focus.

EF-S (introduced in 2003) designed for EOS DSLR models with a compact sized sensor – APS–C (Advanced Photo System Cropped frame) sensor size – lenses lighter and smaller, greater wide-angle choice.

RF mount (introduced in 2018) implements a 12-pin connection between the camera and the lens, a 50% increase over the 8 pins found on the EF mount. Along with more data channels, provides higher speed data transfer for extremely fast AF, enhanced image stabilization and image quality optimization. Canon EF and EF-S lenses can be used on cameras that have the RF mount with mount adapters.

EF-M (introduced in 2012) – more compact compared to the EF and EF-S range, designed exclusively for use with EOS M cameras.

IS – image stabiliser (Canon).

L – Designation for Canon’s professional line of lenses. While more expensive than consumer-grade lenses, these are compatible with Canon Rebel cameras and all use the Canon EF mount. If the lens has a red line, the lens is part of Canon’s L series.

AFD – Arc-Form Drive is the first autofocus motor used in Canon EF lenses. Louder and slower than USM motors. Slower reaction time and no full-time manual focus override. If an autofocus Canon lens has no indication on its barrel what sort of AF motor is used, it is either AFD or MM.

MM –Micro Motor -the least advanced AF motor used in Canon lenses along with AFD. It is a smaller version of the AFD motor. MM is only used in the cheapest Canon lenses, like the EF-S 18-55mm f/3.5-5.6 IS II kit zoom. Does not allow full-time manual focus override like the more sophisticated USM systems do. If an autofocus Canon lens has no indication on its barrel what sort of AF motor is used, it is either MM or AFD.

STM – Stepping Motor – The inclusion of the STM motor allows the camera to focus smoothly and quietly while shooting video and particularly so when using Canon DSLRs equipped with Dual Pixel AF systems. This motor also allows quick AF speeds during still image capture.

USM – Ultrasonic Motor – The inclusion of an ultrasonic motor makes the lens focusing fast and quiet.

DN – lenses designed for compact system cameras.

DO – Diffractive Optics lenses are built to the same exacting standards as L series lenses, but these are designated with a green ring around the lens barrel instead of a red one.

TS-E – lenses with tilt and shift functions,

MP-E – it is a is a prime lens, there is physical extension is because it focuses very close. MP-E focuses from life-size to 5 times life size, provides closer images than macro.

PL mount (Positive Locking) mount or Arri PL – lens mount developed for cinema lenses.

CN-E – cinema lenses for Canon Cinema EOS (Cinema Electro-Optical System). Prime lenses are available with an EF mount, while the CN-E zoom lenses are available in either EF or PL mount. The biggest visual difference between EF and CN-E lenses is that the cinema lenses have gearing around them that allows the focus and aperture to be easily and smoothly controlled via a follow focus or remote control.

I, II, III – designates which version of a Canon lens to distinguish the older model from the newer one.

Read more about Photography Glossary.

Common Sigma Abbreviations

Sigma makes their lenses in a variety of mounts, including Canon (also Nikon, Pentax, Sony/Minolta, some Olympus, and even their own Sigma SA mount).

They backwards engineer the mount and do not pay a license to Canon, so they generally do not use the term “EF” but instead label it as “Canon AF”.

They do not make any lenses using the EF-S mount. Instead, their digital lenses for the “crop” cameras are labelled “DC” and will fit any EF or EF-S mount without interference. So unlike the EF-S lenses, Sigma DC lenses can be used on the older non-EF-S models like the D30/D60/10D.

AF – Autofocus

ASP – Aspherical Lens Elements. A type of lenses that virtually eliminates the problem of coma and other types of lens aberration. They are particularly good at correcting distortion in wide-angle lenses as well as contributing to a lighter and smaller lens design.

APO – Apochromatic lenses. Uses special low dispersion glass for minimum colour aberration and telephoto quality improving contrast and sharpness. APO Zoom Marcos offer up to 1:2 magnification (one half life-size) in the telephoto range with instant shifting from normal to macro shooting. APO Tele-Macros offer a 1:2 image size close focus, when the macro switch is engaged the zoom control ring is fixed at the telephoto end.

CONV – These lenses can be used with the APO Teleconverter EX. It can increase the focal length and will interface with the cameras automatic exposure function.

DC – Lenses designed for APS-C DLSR cameras. Lenses which have been designed so that the image circle matches the smaller size of the image sensor of most Digital SLR’s. Also compact and lightweight.

DG – Lenses compatible with full-frame sensor DSLR cameras. Large aperture lenses with wide angles and short minimum focusing distances. Have peripheral illuminations so are the ideal lenses for Digital SLR cameras, but are still suitable for 35mm SLR’s.

DF – Dual Focus. Disengages the linkage between the internal focusing mechanism and outer focusing ring when in the AF position. Allows holding of the lens as the focusing ring does not rotate during auto-focusing, but gives an adequate focusing torque of the focus ring when manually focusing the lens.

DL – Deluxe. Full-featured lenses and come with a custom lens hood, feature half stop increments on manual aperture settings, depth of field scale, distance scale, infrared correction mark.

EX – Excellence. Used to define professional type lenses, it denotes a superior build and optical quality.

HF – Helical Focus. Eliminates front lens rotation, allowing the use of a perfect hood and easy to use polarising filters.

HSM – Sigma’s designation for Hypersonic Motor. Uses a motor driven by ultrasonic waves to provide quiet, high-speed Auto Focus. Virtually silent, highly responsive auto and manual focusing.

IF – Inner Focus. The lens is able to focus without physically changing its size, where optical movement is limited to the interior of the non-extending part of the lens barrel, allowing for a more compact and lightweight lens as well as closer focusing distances.

MACRO – Used on those lenses which have the ability to be used for close up (macro) photography. Some will have a magnification ratio of 1:3 focusing at 50cm, such as some of their standard Zoom lenses.

OS – Sigma’s designation for Optical Stabiliser. Has a built-in mechanism that compensates for camera shake. Alleviates camera movement when shooting by hand held camera.

RF – Rear Focusing. A system where all the lens elements are divided into specific groups, with only the rear group moving for focusing, making the auto-focus operation smoother and faster.

UC – Ultra Compact. The smallest, lightest lens of its type.

ART – Designed to emphasize creative expression above compactness and multi-functionality

MC – Sigma Mount Converter

Common Tamron Abbreviations

ASL – lenses use one or more aspherical lenses.

DI – Digitally Integrated Design

Di

Digitally Integrated Design – A Generation of lenses designed for optimized use with digital SLR cameras.

Di II – Lenses for APS-C sized sensors only. They are constructed for the exclusive use on digital SLR cameras with smaller-size imagers (Canon EF-S size – max. 16 x 24 mm)

Di III – Lenses for compact system cameras. They are engineered specifically for mirrorless interchangeable-lens cameras. They cannot be used with digital SLR cameras with a built-in mirror box or with conventional SLR cameras.

PZD (Piezo Drive) – it has a piezo drive motor. Read more here.

USD – it has a high-frequency Ultrasonic Silent Drive motor, enabling speedy, silent autofocusing.

XR – Extra Refractive Index Glass Technology. Gives Tamron lenses better performance and allows them to have more compact designs.

Read more about Tamron abbreviations in Tamron glossary

Example:

Canon EF-S 18-55mm f3.5-5.6 IS II DSLR Lens Black

This is a cropped frame sensor Canon electronic focus lens (EF-S) with image stabiliser (IS), 2nd version of the model (II)