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I realize that the above four focal lengths lend to having a different perspective that make them all unique. It might be possible to use one as the other but that isn't always true with the extremes. I'm debating on prime lens and I'm curious how each of those (with the focal length) are built and (ignoring the perspective given) how good they are optically.
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In terms of the four focal lengths (24, 35, 50 and 85) is there one that tends to leads to the sharpest lens built? Is that lens has the least distortion?
I don't know if sharpness is also judged by your subject but if that is the case I'd use it mainly for street photography. I realize that 85mm is very odd for that but doesn't mean you can't compose and see the world in a different way.