This is the first K&F Concept filter I've owned, and thus far, it's working really well. I got the 77mm UV version for an 11-16mm wide angle zoom lens, replacing an amazonbasics UV filter. I have no issues with the Amazon product; it also works well to reduce UV and protect the lens, but I like that the K&F is lighter, thinner, and appears to be at least slightly less reflective.

Going back to the ancient days of film SLRs, I've always been a fan of UV or 'skylight' filters to protect the lens and do some UV reduction at the same time. I've carried this practice over to the digital age, too, of course. I seldom notice a difference between these filters by brand, but the K&F seems particularly well made. I'm not exactly sure how to interpret the significance of the claims on the box (8k? Really? Waterproof?) but do appreciate multicoating and anti-scratch features.

I also wanted to note the nice case the filter comes in. It has the capability of holding different-sized filters and closes securely, not always the case with other filter cases. I'm apt to leave the filter on the lens, but still appreciate this attention to detail.

I get the idea that people minimize the need for filters nowadays; I think they should give them their due, and the K&F is a really nice filter to improve photos and, in particular, protect expensive lenses.