Firecrest Superslim UV IR Cut Filter

Crystal Clear filter

I was concern that there was a Quality Control stamp from May 12, 2015 on the case, but after inspecting the filter, it was still brand new (Today is April 23, 2021). I'd bought the filter for two reasons, protect my lens and assistance in reducing Chromatic abbreviation. I'd say, that if the original lens has that problem, the introduction of a filter is not going to eliminate that problem. The Firecrest reduced CA, maybe about 20%, but then the lens I'm using it on, was manufactured in 1975. I'll take any amount of reduction any day!!