In Still mode you can capture JPEG images at a pixel resolution of up to 1,152x864. You still have access to the same autoexposure, white balance, and image effect modes, though your shutter speed options are limited to 1/60, 1/100, 1/250, or auto. That's more than you see in some camcorders, as is this Canon's nine-point autofocus system. The stills we captured were better than we see from many camcorders, with fairly accurate colors, but they don't approach what you can get from a decent dedicated still camera.
Video was much better. With ample lighting, colors were very accurate and vibrant, and footage was sharp with responsive and quick focus. Once the lighting dims a bit, that starts to change. In normal mode, we saw a fair amount of noise when shooting indoors with low ambient light. Night mode didn't help much. Even with a tripod, the ZR850 had a very difficult time achieving focus. However, it's worth noting that, while very slow, the ZR850 was able to focus eventually in night mode, even in situations where the ZR830 and ZR800 refused to focus. As has become almost standard in less-expensive camcorders, the electronic image stabilization can't handle this camcorder's maximum zoom. We found that it was only effective to about 75 percent of the zoom range.
Despite our gripes, the ZR850 is a very capable camcorder for anyone looking for a tape-based, general purpose, or relaxed vacation camera. If you're thinking about stepping down in Canon's line to the ZR830 or the ZR800, you should note that both of those models use 680K sensors, which typically show a noticeable drop off in video quality compared to a 1-megapixel sensor, such as the one in the ZR850.