Negative Positive
Title: Serves it's purpose well
Review: I bought this filter to protect the front end of my lens from scratches (better it scratch the $7 filter than the $400 lens). It went on to the lens easily, and hasn't come off on it's own yet (I leave it on all the time as a protective layer). The only issue I've had is that the lens cover doesn't seem to attach as readily to this as to the lens itself, though that hasn't caused a problem yet.
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