>>3395838>5D Mark III. 16 bitno, it's 14 bit camera. but that doesn't matter with canons, because their read noise levels are so high that even 12 bits would be enough to encode the dynamic range. now, contemporary sony sensor on the other hand, where the read noise floor is so low that it's easy to produce a) posterization or b) rounding errors if the raw is processed in any manner.
here's a flat field corrected d800 image (or rather a bunch of them stitched together), where the colour bands are caused by nikon's white balance preconditioning (it's a simple multiplication of raw sensor data with a number close to one) and subsequent rounding errors. I know of this because I've used nikonhacker's firmware on the camera that disables all such processing and the colour bands are never a problem.
