Aps C
APS-C is a sensor size smaller than full frame, though not a single standardized dimension — Canon's version measures 22.3x14.9mm (1.61x computed crop factor), while Nikon, Sony and Fujifilm share a slightly larger 23.5x15.6mm sensor (1.53x computed crop factor). The name traces back to the Advanced Photo System film format, though no digital sensor exactly reproduces that original film dimension.
APS-C's smaller size and stricter circle of confusion give it a shorter hyperfocal distance than full frame at an identical real focal length and aperture, and more forgiving depth of field once framing is matched (since matching needs a shorter real lens). Fujifilm builds its entire flagship X-series around this format rather than treating it as a stepping stone to full frame.
Frequently Asked Questions
Why does Canon's APS-C use a different crop factor than other brands?
Because its physical sensor is slightly smaller (22.3x14.9mm against 23.5x15.6mm), giving it a genuinely different diagonal measurement and therefore a different computed crop factor, 1.61x against 1.53x.
Is APS-C the same size on every camera?
Close, but not identical — the exact dimension has stayed consistent within each brand's own lineup across many generations, but it genuinely differs between Canon and every other major APS-C manufacturer building this format today.