Quote Originally Posted by Jon Ruyle


This is strange. In theory all things being equal there should be no difference in noise between FF and crop in this comparison. The 7D has a slightly less noisy sensor (less read noise), so I would have been sure the 7D would come out slightly ahead. Of course John is using ISO 200 instead of ISO160, but I still would have thought the difference between 5D and 7D to be almost zero.


Perhaps the difference has more to do with metering than anything else. To compare photon noise fairly, ISO isn't so important, but both cameras should have the same shutter speed (and ISO should be set to expose reasonably), so perhaps manual mode is best. John- were the shutter speeds similar?

Jon


I kind of took the side by side test to be a comparison of equal DOF from both lenses and bodies. (F11 vs F6.7 or 6.7 x 1.6 to get to F11). I would think the 7D will have had a higher shutter speed to compensate for the difference. I am sure John will in lighten us.


But as for Noise, in theory it may or may not be true, but I have my own theories. The firmware writers at canon may not work in theory, but marketing. The 7D pictures have so much more room for improvement out of the camera compared to the 5D and 1D it is almost like canon dumbed the firmware down in the 7D so that it wouldn't be as competitive with its big brothers. (this is my conspiracy theory)