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I printed out a test chart and shot it today. I feel like I've graduated from ordinary gearfaggotry to hard-drug gearfaggotry. I'm a bit ashamed of myself.
On the other hand, My Pentax-A 50/1.4 does really seem to be as sharp as it's going to get in the center by about f/2.0, and in the corners by f/2.8, so that's nice to know.
