Originally Posted by Mark Elberson
Ah, there you are, Mark. I was thinking that what we needed was you
Don't you agree that at much larger than macro distances, 50mm @ f/1.2 is equivalent in terms of framing at a given subject distance, compression angle, etc to 85mm @ f/1.8? (Not exactly, because 50 * 1.6 is 80, not 85, and 1.2 * 1.6 is not exactly 1.8, but never mind these small differences).
And if you agree with that, don't you agree that to compare the IQ of these systems (modulo differences inherent in the specific cameras such as pixel density, OLPF, etc etc) it is valid to compare 50 @ f1.2 taken on full frame with the outer 60% of the picture thrown away (because that's what you get when you take a picture with the crop camera) to 85mm @ 1.8?
And yes, I know, it would be better to just take a picture with 50 @ f/1.2 with the 7D and compare it to 85mm f/1.8 on the 5DII, but we don't have that 'cause Bryan didn't take pictures with the 50 @ f/1.2 and the 7D.
That's all I'm sayin'. I'm not telling anyone what they should or should not buy []
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