Covers the lens for protection but the neoprene sections rub against each other and create resistance making it difficult to adjust the zoom ring. I could try trimming part of the zoom ring, but then the lens seams would be more exposed. In the end I just took the whole piece off. The version I bought in black for my Sigma 70-200 didn't have this problem. And just a note, if you store your lenses in foam trays or in matching cases, you may need to remove part of the lens hood for storage.
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