First off lets get something clear: An APS-C camera using the same full frame equivalent focal length, and the same literal aperture as a full frame camera (For example an X-T4 with a 35mm set at F/2 and a Sony A7iii with a 50mm set at F/2) will produce different results optically from the image captured on the Full Frame camera.

So your subject's facial features taken with a 28mm lens on an APS-C will look identical to a picture taken with a 28mm lens on a full frame camera and identical to a picture taken with a 28mm lens taken with a medium format camera - taken from the same spot. The difference will be that the head in the shot taken with the APS-C sensor will take
Low light performance is also less in smaller formats. A larger sensor size allows for larger pixel sizes, so a 24mp camera in Full Frame has better low light performance than a 24mp sensor in an APS-C format camera because the actual pixels are larger. That’s oversimplified, but you get the idea.
This illustration compares digital camera sensor sizes: full frame 35mm (which is actually 36mm wide), APS-C, Micro Four Thirds, 1-inch, 1/1.7″ and 1/2.5” Type. For new digital cameras, a bigger sensor area captures better quality, but requires larger-diameter, bulkier lenses. As of 2018, 1-inch Type sensors optimize the size of a serious Full Frame vs. APS-C Camera Differences 1. Sensor Size. The biggest point of difference between an APS-C sensor and a full-frame sensor is the size of the sensor. If you take a 20 MP APS-C sensor and compare that with a 20 MP full-frame sensor you’ll see the full-frame sensor is bigger and also the individual pixels or light receptors are larger. The difference between lenses designed for smaller sensors and for full frame is that one covers the entire full frame sensor, the other one doesn't. But if you buy a 16mm lens designed for APS-C cameras, you'll still get a 24mm FOV on an APS-C camera, the same thing happens when you use a full frame 16mm lens on an APS-C camera. . 425 868 661 125 854 693 388 978

difference between full frame camera and aps c