VIDEO. The YI Technology 4K Action Camera takes good video, at a quality like nearly all Action camcorders. Pictures were a bit soft, which means it will be difficult to make out tiny details and very subtle patterns in the image. In low-light situations, the video was good: quite viewable but not as bright or clear as the better models. It captures Ultra HD video at 3840x2160 at 30 frames per second (fps), progressive-scan (p). It has an above-normal frame-rate mode 1920x1080 at 120p fps.
AUDIO. It captures poor audio in mono.
PHOTO QUALITY. In Photo mode it captures at best 12-megapixel stills with very good quality.
LENS. The lens has a fixed focal length; it has no zoom capability. The lens also has a very wide-angle (14mm) capability that's very useful for landscapes and group portraits, although you may notice a bit of distortion when you're shooting faces up close, for instance.
IMAGE STABILIZER. Shooting in well-lit scenes, this model did an excellent job of minimizing the effects of camcorder shake.
ADDITIONAL COMMENTS. It survived our repeated-drop test. It has a large 2.2-inch touchscreen LCD, which has good quality that lets you compose your shots and has decent playback of video. This model is about average in size and much lighter than the average action camcorder.
