APS-C (Canon, 1.6x)

Canon's APS-C sensor measures 22.3 by 14.9mm — smaller than every other brand's APS-C format, which is why Canon bodies get their own distinct 1.6x crop factor rather than sharing the 1.5x figure used by Nikon, Sony and Fujifilm. The gap is small in absolute terms, but it's real, and it's a common source of confusion when photographers compare focal-length-equivalent specs across brands without realizing "APS-C" was never a single standardized size to begin with.

Why Canon's APS-C Ended Up Slightly Smaller

APS-C traces its name back to the Advanced Photo System film format's "Classic" frame size, but no digital sensor manufacturer actually reproduced that film dimension exactly — each built to its own close-but-distinct size when the digital era began, and none has changed since across multiple camera generations. Canon's line, from its earliest APS-C DSLRs through to its current EOS R7 and R10 mirrorless bodies, has stayed at this same 22.3x14.9mm dimension the entire time, which is one of the more stable specs in Canon's whole APS-C lineup even as sensor resolution and technology moved forward dramatically.

The 1.6x Crop Factor in Practice

A 50mm lens mounted on a Canon APS-C body frames like an 80mm lens would on full frame — a genuine short-telephoto field of view rather than the "normal" perspective 50mm delivers on full frame. An 18mm ultra-wide becomes roughly a 29mm-equivalent, meaningfully narrower than the same lens reads on a 1.5x-crop competitor. This half-stop-ish difference from the more common 1.5x figure rarely changes a purchasing decision on its own, but it does mean a Canon-specific APS-C lens marketed at a given focal length won't frame identically to a same-focal-length lens on a Nikon or Sony APS-C body.

Depth of Field on This Format

This sensor's tighter 0.0179mm circle of confusion (against full frame's 0.0288mm) genuinely narrows depth of field at a fixed real focal length — but matching a full-frame shot's framing needs a shorter real focal length here, and that shorter focal length wins out, leaving Canon APS-C meaningfully more forgiving than full frame once framing, not real focal length, is held equal. That's the physical reason Canon's APS-C bodies (the EOS R7, R10, and the long-running xxD and Rebel/xxxD DSLR lines before them) have a reputation as forgiving for handheld run-and-gun shooting where maximizing sharp area matters more than isolating a subject with heavy background blur.

Where This Format Shows Up

Canon has used this exact sensor size across its entire consumer and enthusiast APS-C range — the EOS R7 and R10 in its current RF-mount mirrorless lineup, and for over a decade before that across the EOS xxD enthusiast DSLR line and the entry-level Rebel/xxxD series. Wildlife and sports shooters on a budget frequently choose this format specifically for the reach the 1.6x crop factor provides with a telephoto lens, since a 300mm lens frames like a 480mm lens would on full frame without the size, weight or cost of an actual 480mm full-frame optic.