Seems to me looking at the TDP pictures that the moire subjects were showing moire in both the 5ds and the 5dr. Also seemed the 5dr looked a lot better for landscape. As far as feathers, I am a bird photographer, but, this sort of camera is not really a bird photography camera anyways, either s or r. Also, one is rarely taking pictures of a few feathers filling the frame, so the moire would be far less likely. However, as I mentioned, that is a moot point because these really are not the cameras for bird photography anyways.
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