Canon APS-C = 1.6. Micro Four Thirds (Panasonic & Olympus) = 2. So, a 24mm lens used on a full frame camera would have an apparent focal length of 24mm, as expected as this is the reference to which we compare other sensor sizes. The same 24mm lens used on a Nikon APS-C camera would have an apparent focal length of 24 x 1.5 = 36mm.
Same with an APS-C camera compared to a full-frame camera; you get more depth of field using the APS-C camera, assuming the effective focal length on both cameras is identical. For example, an image shot at f/1.8 on a Micro Four Thirds camera gives an output similar to an image shot at f/3.6 on a full-frame camera and f/2.7 on a crop-sensor camera.
Sensor Size. One of the main differences between these three sensors lies in their size, Medium format sensor sizes typically range from around 43.8×32.9mm to 53.7×40.2mm. On the other hand, Full frame comes with a film size of 36mm by 24mm. However, the size of APS-C varies among different manufacturers. For example: Nikon, Fujifilm and Sony
The difference between full frame and APS-C sensors is their size. The measurement between any two sensors is known as the crop factor. Full frame to APS-C is generally 1.5x (i.e., the full frame sensor is 1.5x larger).
I'm told that there's only a one-stop difference between a full-frame and an APS-C sensor, which doesn't seem like much. For example, this is a 13-second exposure on my NEX (at ISO 100): With a one-stop advantage on a full-frame sensor, I'd still need a 6.5-second exposure at ISO 200, to maintain the same quality.
The Origin of APS-C Sensors. It should not come as a surprise, but APS-C sensors have been around for a long, long time. For those wondering, the full form of APS-C is Advanced Photo System, a film format that was used widely in the mid 1990s but has been discontinued ever since. No one really knows when the first APS-C camera came out, but the
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    • difference between full frame camera and aps c