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Sand/Grinding noise in focus ring
Sand/Grinding noise in focus ring I recently was diagnosing my 70-200 f-2.8 II and I found that my focus ring makes this sand grinding noise. I also found that the focus ring when turned counter clockwise slowly, it doesn’t actually move or moves slowly (not in sync with the rotation). However when I turn clockwise the focus distance goes smoothly and is in sync. What should I ...
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