Excellent as full HD webcam
I bought this 800D (same as T7i) camera specifically to use as a high-end full HD webcam with the EOS webcam utility using USB connection directly to host computer. I searched for any Canon EOS series that supported Dual-Pixel Autofocus with live-tracking face-detection that would work well with the Canon EF-series lenses that I already have. This model (which is not the current model) meets all my needs and was available at significant discount compared to the newest T8i model (which has additional features I don't need).
I paired this 800D body with the EF 35mm f/2 IS USM lens (which is equivalent to 50mm on a full-frame body). The face-detection autofocus is better and faster than my 5D IV, or C100 II cinema cameras. It will track all the way to the edges of the image. Silent, fast, perfect focus, continuously, all day long.
I use a dummy-battery with external adapter to power the camera from AC so I don't have to worry about battery life. The touchscreen flips-out and faces forward, automatically flipping the image so I can monitor what the camera sees (with data overlay and focus box).
I am not using the Auto white-balance. There are limited options for custom white balance on this model, but I am using 5200K to match my light-source, and the resulting color, contrast, skin-tones looks really excellent. This looks as good as the 5D IV at 6X lower price!
Audio: When used as a webcam, regardless of whether you connect an external mic or use the built-in mic - note that you will not get audio out of the USB webcam interface, or the HDMI out. So plan on using some other source, connected separately to your host computer for audio. This 800D will only provide the video. If you are looking for "clean" HDMI out, it is only possible to get this by turning-off all menu/info displays, AND switching-off autofocus. If you need the autofocus (the whole point of using the camera), then the HDMI out will have focus overlays. So I would not recommend using this as an HDMI webcam. The EOS Webcam utility over USB works very well, but does have noticeable latency. If you have the ability to delay your audio to the host, then you can get perfect lip-sync, even with the latency of the USB interface.
I have not used this as an everyday DSLR, but I am quite impressed at the nice build-quality, great image quality, and nice compact size. I might consider this as a travel camera instead of the big, heavy 5D in the future.Read full review
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