I'd agree that the error is no big deal, if tolerance really meant plus or
minus. It doesn't. When was the last time you read a test report that
found that a lens gave you more of what you thought you paid for? A 20 mm
that measured at 19.4 mm? A 200 mm that gave you 205 mm? An f/2 that was
I'd agree that the error is no big deal, if tolerance really meant plus or
minus. It doesn't. When was the last time you read a test report that
found that a lens gave you more of what you thought you paid for? A 20 mm
that measured at 19.4 mm? A 200 mm that gave you 205 mm? An f/2 that
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