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Old Mar 10, 2005, 11:34 AM   #1
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Sorry, I posted this on digital cameras and then realized it should have been here. Anyway, how do you know if you have a bad copy of a lens? That is, how should you test it and if you feel you do, how do you handle it?


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Old Mar 10, 2005, 12:38 PM   #2
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FYI - http://md.co.za/d70/focus20.pdf

You can also use this chart: http://www.graphics.cornell.edu/~wes...res-chart.html
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