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      10-26-2011, 07:37 AM   #10
Chewy734
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Drives: 2006 BMW 330i ZPP, ZSP
Join Date: Dec 2008
Location: Minneapolis, MN

Posts: 6,792
iTrader: (15)

It causes vignetting on my 17-40mm f/4L on the 5D2. On the 20D there is no vignetting.
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