Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Review of what?

Ok - I'm not to sure how to review these uv/clear glass filters. Here's what I wrote for one of a different diameter:"Ok, there's not much really to rate here. I think that some UV/clear glass filters might be bad (obvious distortion, easily scratched etc.)- but most of them offer nothing much more than some cheap glass to protect your expensive glass.(Nothing appreciable anyway - I cannot discern their different UV blocking properties.)"I mean seriously, if it's kept clean then the resulting distortion or chromatic aberration should be pretty minimal/unnoticeable.:) Umm . . . that said, I still take it off every now-and-again - sometimes it confuses the autofocus in low light if it has to use the flash for focusing.