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My college son has a 4 month old EOS 20D which he tells me is giving him "dust like" imperfections in the images, but not consistently. The flaws seem to appear at slower shutter speeds below 1/125 with small f-stops f11 and higher. Has anyone experienced this problem or can shed any insight as to the problem and solution? Apparently, there are not too many flaws which ruin the picture, just a nuisance.

I haven't seen the images personally, so I hope I am describing this correctly; I'm still "old school" with my Nikon F3HP which still serves me well. Unfortunately, he is doing an externship in Florida and has no computer hook-up which would allow me to download some of these images.

Thank you in advance.

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Never heard of the problem, but worth trying shots with a borrowed lens or another size lens to see if it is camera or lens related issue.
Buddy

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