![Quote](images/misc/quote_icon.png)
Originally Posted by
CP Goerz
As EVH says, although I didn't state it I made the assumption that the shooter 'would' use the same equivalent focal length on the smaller format. Lets say he was using a 150mm lens on a 4x5, I wouldn't expect him to use a 150mm on a 35mm but if he used a 50mm lens stopped down to 16 you'd have a sharper print than a 150mm lens on a 4x5 stopped down to the same F stop.
I believe it has something to do with the circle of confusion, although I understand the principal I get confused when I try to explain it :-).
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