"As far as dynamic range is concerned, we're told that the new 5DS and 5DS R should give the same performance as the current EOS 5D Mark III."

natomiast szumy na poziomie 7d2:
"Canon tells us that at a pixel level, noise levels should be very similar to the EOS 7D Mark II and slightly better than what we'd expect from a 5D Mark II (note: not a 5D Mark III)."

źródło: http://www.dpreview.com/previews/canon-eos-5ds-sr/5