Canon 77mm 500D close up lens on 70-200mm F4 L IS?

Started Jan 29, 2010 | Discussions thread
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bimmerguy288 Forum Member • Posts: 61
Canon 77mm 500D close up lens on 70-200mm F4 L IS?

Hello all. First time to post here. Great group of folks in this forum. I am relatively new to the DSLR world. My question is, if I use a Canon 77mm 500D close up lens on my Canon 70-200mm F4 L IS lens with a 67mm-77mm step up ring, will it degrade the IQ due to the 10mm difference in diameter between the close up and the tele?

Thank you in advance for all your advice.

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