This is our standard studio scene comparison shot taken from exactly the same tripod position. Lighting: daylight simulation, >98% CRI. Crops are 100%. Ambient temperature was approximately 22°C (~72°F). Camera settings as per previous pages.
Canon EOS-1DS Mark III (RAW) vs.
Canon EOS-1D Mark III (RAW)
Canon EOS-1Ds Mark III (RAW)
Canon EOS-1D Mark III
4.8 MB JPEG (5616 x 3744)
3.1MB JPEG (3,888 x 2,592)
Taking the JPEG processing out of the equation shows far more clearly the resolution difference between Canon's two flagship professional SLRs, but you need to be really pushing the files to high enlargement factors for it to matter.