When recording in-camera, 4K video has 4:2:2 sampling and 8-bit color depth, while Full HD 1080p footage has 4:2:0 sampling. Uncompressed Full HD 1080p video can also be saved via HDMI to an optional external recorder with 4:2:2 color sampling. 4K video is recorded using a central 4096 x 2160 area of the sensor at a 1.74x crop in order to record video with an ideal 1:1 pixel sampling ratio, while Full HD recording makes use of the entire full frame.
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