The faster frame rate of the iv is also attractive for birds in flight photos, but not enough of a thing that I wouldn't consider the iii. ". Between the 5D3, 5D4, and 7D2, you will get a much higher frame rate, improved low light performance, and better AF performance. Sony a6400. Overall Score. DXOMARK overall sensor score. 81%. 83%. Portrait (Color Depth) As described by DXOMARK 'The Portrait score in our camera sensor reviews defines color depth performance and its unit is a number of bits. A color depth of 22 bits is excellent; differences below 1 bit are barely noticeable.'. .

canon 1d mark iv vs 5d mark iii