What is the 35mm equivalent focal length on Canon APS-C?
A roughly 22mm lens on Canon's APS-C sensor gives about the same field of view a 35mm lens gives on full frame — divide the target full-frame focal length by Canon's real computed crop factor (1.61x, slightly higher than the 1.53x used by Nikon, Sony and Fujifilm's APS-C sensors) to reach this figure.
Why Canon Needs a Slightly Different Number Than Other Brands
Canon's APS-C sensor measures 22.3x14.9mm, marginally smaller than the 23.5x15.6mm APS-C sensor Nikon, Sony and Fujifilm all share, which is why Canon gets its own distinct 1.61x crop factor rather than the 1.53x figure used elsewhere. The practical difference is small — a Nikon/Sony/Fujifilm APS-C body would need roughly 23mm instead of 22mm for the identical 35mm-equivalent field of view — but real, and worth accounting for if you're comparing focal-length-equivalent specs across brands rather than assuming every APS-C sensor uses the same multiplier.
The Nearest Real Lens Options
22mm isn't a common standalone prime focal length, so photographers targeting this equivalent field of view on Canon APS-C typically reach for either a wide zoom's appropriate setting or one of the handful of dedicated wide primes built close to this length (20mm or 24mm being the more commonly available real options, giving a slightly wider or slightly tighter equivalent than an exact 35mm match).
Get the exact equivalent for any target focal length in the Crop-Factor & Equivalence Converter, pre-filled with 35mm on full frame converting to Canon APS-C.
Frequently Asked Questions
Why isn't there a common 22mm prime lens for Canon APS-C?
Lens manufacturers generally build primes at conventional round focal lengths (20mm, 24mm, 35mm) rather than at the exact equivalent-conversion figure for one specific target field of view, so photographers wanting precisely a 35mm-equivalent look typically accept a lens that lands close rather than exact.
Does this conversion change if I'm using a Canon full-frame body's APS-C crop mode instead of a genuine APS-C camera?
The crop factor is very close either way, since a full-frame body's APS-C crop mode reads out a region close to this same physical sensor size, though the exact figure can vary slightly by camera model and firmware implementation.