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Would this little thing impact the lens’ performance?
Would this little thing impact the lens' performance? Hi, I've recently got a used EF 50mm, and it has a bit stiff focus ring, which is not really an issue, and this mark on the lens, which looks like a tiny cloth particle under the glass. It persists after cleaning. It is obviously invisible on the photos, but would it negatively impact the lens' performance? I can return it if needed. Thanks!
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