The 800D is built around a 24.2-megapixel APS-C CMOS sensor – as used inside the more advanced 80D ( £840 body-only) . While the 750D/760D also sported 24.2-megapixel sensors, neither encompasses Canon’s Dual Pixel AF technology, so while effective resolution remains identical to the 800D’s sensor, it represents a fairly big step forward.