I have a question about depth-of-field. I've noticed that my new Nikon D800 has a much shallower DOF than my old DX D300. I knew this would be the case...however, I did NOT relaize that setting the apeture to gain more DOF causes the D800 to produce severe diffraction due to the high resolution.
DOF is pretty important for aquarium shots, what with moving fish, etc. Does anyone know - if I shoot the D800 in DX crop mode, will I regain that lost DOF? I tried some test shots, but it was inconclusive to my untrained eye.
If not, does in-camera downsampling improve DOF at all?