COMPATIBILITY - Works with these popular Canon cameras that use LPE6NH batteries: Canon EOS 5D Mark II, EOS 5D Mark III, EOS 5D Mark IV, EOS 5DS, EOS 5DS R, EOS 6D, EOS 6D Mark II, EOS 7D, EOS 7D Mark II, EOS 60D, EOS 60Da, EOS 70D, EOS 80D, EOS 90D, EOS R, EOS R5, EOS R5C, EOS R6, EOS R7, EOS Ra, XC10, XC15, BG-E6, BG-E7, BG-E9, BG-E11, BG-E13, BG-E14, Blackmagic Design Pocket Cinema Camera
Canon 5D Mark IV Review - 5D Mark IV Image Quality. The jump in resolution to 36MP is a big benefit to base ISO image quality for the Nikon D810, as there's simply far more detail and clarity
In very simplistic terms the 4K on the 5D-IV is a collection of good quality JPEGs and that is why the size gets so high. You can use the proxy file methodology within many video editing softwares to edit 4k from a 5D-IV on a non-highend computer. As an aside I use SD cards for 4k rather than CF cards because SD's can save one large file of any 2YR3MF.