Video quality is very good for a consumer dSLR but not outstanding for its price class (if you count the price with the 18-135mm lens), which includes models like the SLT-A65 and Panasonic Lumix DMC-GH2. The camera's tonal range is fine for a consumer model, but there isn't a lot of latitude in shadows and highlights, despite the fact that the camera offers a +/- 5-stop bracketing range. If you shoot raw, you've got latitude up to about ISO 1600, but you'll end up applying a lot of luminance NR to get rid of the hot pixels. I suggest you don't use the default Auto Picture Style when shooting JPEG in low light, because it boosts the contrast and you really lose a lot of shadow detail. At high ISO sensitivities the noise reduction is relatively intelligent, with suppression artifacts only in the dark areas and on some high-contrast edges. JPEGs are fine up through ISO 400 if you're not a pixel peeper if you are, you'll find even slightly out-of-focus areas start to show some artifacts as low as ISO 200.

Overall, the photo and video quality of the T4i still rates as excellent, though at high ISO sensitivities it's slightly surpassed by the T3i it looks like either the blue channel in the new sensor just isn't as sensitive as the previous one or Canon's processing the heck out of it.

That said, the new sensor and expensive STM lens that you have to pair with it to take advantage of improved Live View autofocus really serve to bring the T4i into parity with newer technology, such as Sony's fixed-mirror SLT system and mirrorless ILC alternatives.

The big updates to the T4i (aka the EOS 650D overseas) over its predecessor are the addition of a touch screen and the incorporation of a new hybrid CMOS sensor that includes both contrast autofocus sensors, the type of autofocus used in camcorders and other video AF systems, as well as the traditional phase-detection sensors you find in dSLRs.

People who use Live View with autofocus for stills or video are the biggest winners with this generation of the top model in Canon's EOS Rebel series.

Canon rebel t3i review techradar