Canon EOS R8vsSony a6700: Full-Frame or Stabilized APS-C?

The Canon EOS R8 uses a full-frame sensor, and that extra area is the single biggest reason to pick it. Larger photodiodes gather more light per pixel, so a full-frame body holds up better in dim rooms and at dusk, and it gives a shallower depth of field at the same framing for that blurred-background look. The ISO ceiling reflects the same advantage: 102,400 native against 32,000 on the Sony a6700.

Megapixels cut the other way, but barely. The Sony's 26 MP gives a little more room to crop a still and still print large, while the Canon's 24.2 MP is plenty for anything short of heavy cropping. Between these two, sensor size decides far more images than the 1.8 MP gap does.

The Sony a6700 has in-body image stabilization rated at 5 stops. That means handheld shots at slower shutter speeds stay sharp without raising ISO, and it is the difference between usable and blurred footage when you are walking with the camera. It also stabilizes any lens you mount, including third-party glass without optical stabilization.

The Canon EOS R8 has no sensor-shift stabilization at all, so it relies on stabilized RF lenses. Shoot mostly static scenes on a tripod or with IS glass and this barely registers. Shoot handheld video or low-light stills on unstabilized primes and the Sony is the easier camera to live with.

The Canon EOS R8 is the faster camera on paper, and it splits by shutter type. Its electronic shutter reaches 40 fps, which is a genuinely different tool from the Sony a6700's 11 fps: you get far more frames around a bird taking off or a sprinter leaving the blocks, and more chances one is sharp. Drop to the mechanical shutter, though, and the Canon falls to 6 fps while the Sony holds its 11 fps with no rolling-shutter risk.

Subject detection favors the Sony slightly on breadth. Both recognize humans, animals, birds, cars, trains and airplanes, and the Canon adds motorcycles while the Sony adds insects. The Canon also offers a 0.5 s pre-burst so you can capture the moment before you press the button. For insects, pick the Sony; for motorcycles or pre-capture, pick the Canon.

Both record 4K in 10-bit with a log profile, so gradeability is a wash before you touch the specs. The Sony a6700 pulls ahead at 120 fps in 4K, which gives you four-times slow motion at that resolution. On the Canon EOS R8 the ceiling is 60 fps, fine for normal-paced footage but short of a proper slow-motion mode.

Read the footnote before you commit: full-width 4K tops out at 60p on both cameras, and the Sony's 120p uses a crop. That crop narrows your field of view and costs you the wide end of a zoom, so if slow motion is the reason you are buying, budget for a wider lens. Neither camera records RAW video internally.

The Sony a6700 lasts noticeably longer per charge: 570 shots against 370 on the Canon EOS R8. That is roughly one and a half times the shooting, so a day of travel or an event shoot may need no spare on the Sony and definitely will on the Canon.

The bodies trade bulk in different directions. The Canon is lighter at 461 g and slightly thinner front to back, but the Sony is the smaller camera overall, narrower and much shorter, which matters if you want a body that disappears into a jacket pocket with a compact lens. Both charge over USB, both have a headphone port and a micro HDMI, and both are rated to the same 0 °C minimum.

The Canon EOS R8 is the better action camera indoors or under lights, because the full-frame sensor and its much higher ISO ceiling let you keep shutter speeds up in poor light, and 40 fps electronic burst floods you with frames at the decisive moment. Its 6 fps mechanical rate is the catch if you shoot fast-moving subjects that would smear under an electronic shutter.

The Sony a6700 is the better everyday action camera outdoors. Its 11 fps mechanical burst works in daylight without rolling-shutter distortion, the stabilization steadies panning shots, and the battery keeps up through a long game. Choose by light and by subject speed, not by the headline burst number.