Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poorly constructed filter

Much has been said about how poorly this lens performs since it is not multi-coated, but that is the least of its problems. The lens I received is very poorly constructed. The glass does not sit tightly within the metal frame; it moves and rattles around. I would never install this on a lens a care about, and I certainly will never consider another Tiffen filter. Fortunately, I did not pay for this filter (it was free with a new Canon lens) and thanks to the reviews I had the good sense to order a more expensive mutli-coated filter at the time I bought my lens. I'll keep this one around in case I ever want to try some type of 'risky' shot where I'm likely to end up damaging the filter.