Title: A must to protect your lens
Product review: I'd give it a 5 EXCEPT where it came from it must have been sitting in a dusty environment. The filter had DUST on it in the case. I don't know if the factory case comes sealed or not, but mine did not have a seal on it. I had to use an air pressure device to get the dust off of it (a good layer of debris).The filter itself was in fine working condition with the exception of the thick layer of dust that managed to get inside the case.I strongly encourage everybody with a 77mm lens to buy one to prevent damage to your lens. It's worth the investment!
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