What’s the difference between full-frame vs APS-C vs Micro Four Thirds sensors? And how do these sensor distinctions affect your images?
Thinking about video camera sensors can get pretty confusing. That’s why I break all of it down for you in this article– and I provide plenty of examples to show the electronic camera sensor impacts.
If you want to know, when and for all, how sensor type impacts your images, then let’s get started.
What is a full-frame vs an APS-C (crop) vs a Micro Four Thirds (MFT) cam?
The sensor is the part of a camera that really catches an image. It takes in light, which it then converts to image information.
Now, different camera types provide different-sized sensing units, which’s the basic difference between full-frame, APS-C, and Micro Four Thirds video cameras.
A full-frame video camera contains a sensor size equivalent to 35mm movie (36 mm x 24 mm). This is the biggest sensor size marketed to photography consumers.
An APS-C camera, on the other hand, has a smaller sized sensor. The specifics depend upon the electronic camera brand, but the sensing unit size is generally around 23 mm x 15 mm.
There are Micro 4 Thirds cams, which consist of Micro Four Thirds sensors; these are even smaller than APS-C sensors, clocking in at just 17.3 mm x 13 mm.
Now, apart from the physical sizes, there are a number of important distinctions between full-frame, APS-C, and Micro 4 Thirds sensing units.
So let’s take a look at the factors impacted by sensing unit size, starting with:
Crop Factor
State you mount a 50mm lens on a full-frame video camera. When you press the shutter button, it catches a 50mm image.
Makes sense, right? A 50mm lens captures a 50mm image. Simple.
But what if you install a 50mm lens on an APS-C electronic camera? Will it capture a 50mm image?
The answer is no.
Because an APS-C sensing unit is smaller than the full-frame sensor, the sensor crops the frame, giving you an outcome that looks zoomed in-as if you took the image with a 75mm lens instead of a 50mm lens.
The effect is similar to taking an image with a 50mm lens, then heading house and cropping the image on your computer system. You’ll get a tighter shot, one that looks like it was taken with a longer lens.).
And that is what the term crop factor implies. It refers to the various crop results produced by different sensor sizes. A full-frame cam is the requirement; it has no crop element. An APS-C sensor (also known as a crop sensing unit), has a crop factor of 1.5 x (on Nikon and Sony video cameras) or 1.6 x (on Canon cams). The Micro Four Thirds crop element is even stronger: 2x.
Focal length
A crop element has a predictable affect on your lens’s focal length.
You see, the focal length measurement of any provided lens is based on the basic 35mm movie format. And since an APS-C video camera (and a Micro Four Thirds video camera) crop out the edges of the frame, you wind up with an “efficient” focal length that corresponds straight to the initial focal length increased by the crop element.
A crop-sensor cam such as the Nikon D5600 has a crop factor of 1.5 x. Thus, if I install a 35mm lens on my Nikon D5600, it would multiply the focal length by 1.5 x, efficiently offering me a focal length output of around 52.5 mm.
( But if you mount the same lens on a full-frame Nikon body such as the D850, it provides an output of 35mm.).
Likewise, if you install a 35mm lens on a Micro 4 Thirds camera– which has a crop factor of 2x– it efficiently doubles the focal length to around 70mm.
Depth of field
As with focal length, a multiplier effect gets applied to the aperture when using APS-C and MFT electronic cameras.
The aperture or f-stop is among a number of factors determining the depth of field. Thus, a Micro 4 Thirds camera offers us more depth of field when compared to a full-frame camera, assuming both video cameras are utilizing equivalent reliable focal lengths. Exact same with an APS-C cam compared to a full-frame electronic camera; you get more depth of field using the APS-C cam, assuming the effective focal length on both video cameras equals.
An image shot at f/1.8 on a Micro 4 Thirds video camera offers an output comparable to an image shot at f/3.6 on a full-frame electronic camera and f/2.7 on a crop-sensor video camera. This is assuming that the efficient focal length and other shooting conditions remain the exact same.
Full-frame sensing units are larger than APS-C and Micro Four Thirds sensing units.
As you can probably guess, full-frame video cameras tend to be far larger and much heavier than their APS-C and MFT equivalents.
For some professional photographers, this won’t matter much; if you shoot in the studio every day, a smaller sized Micro 4 Thirds cam will not use much of an advantage.
If you’re a travel photographer who needs to keep your gear as light-weight and compact as possible, a Micro Four Thirds body is a wonderful choice.
Plus, APS-C and MFT video cameras are more convenient. You can hang them on your neck or keep them in a knapsack throughout the day without seeming like you’re bring a brick.
Low-light Performance
Generally, full-frame cameras include superior low-light and high-ISO performance. This results in much better image quality than crop-sensor (or Micro 4 Thirds) electronic cameras can accomplish.
But why do full-frame cameras carry out much better in low light?
Full-frame cams have bigger sensing units and are therefore efficient in catching more light than their smaller-sensor equivalents, which lessens unwanted sound.
Micro Four Thirds video cameras do not perform well under low-light conditions where the ISO needs to be cranked up to, say, above 1600.
( Note that full-frame cameras likewise provide superior dynamic variety, which permits you to record more information in a single shot.).
For these factors, while full-frame cams can be costly, bulky, and frustrating to carry around, they are still the industry requirement and the preferred cams for nearly all expert photography work.
Full frame vs APS-C vs Micro Four Thirds: conclusion
Now that you’ve completed this article, you must hopefully have a grasp on the distinctions in between these sensing unit types– and why you may wish to choose one sensor over another.
Simply keep in mind:.
All three sensors– complete frame, APS-C, and MFT– are very capable of capturing spectacular photos.
Don’t worry too much about the distinctions.
Do you have a preferred sensor type? Which of these three sensors does your camera use? Share your ideas in the comments below!
