How many would choose stellar 50mm f/2 IS over a mediocre 50mm f/1.4/1.2?

nup - i'd still buy the 50 f1.2L - for the depth of field that f1.2 provides, it's plenty sharp at f2 that i'd imagine it would match a newer 50 f2 IS anyway - that an f2 isn't enough more speed to warrant owning another lens over my 24-70, while f1.2 is.

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