K&F Concept 49mm UV Filter for Camera Lenses,18-Layer Multi Coated UV Protection Filter Nanotech Coatings, Ultra-Slim

Unexpensive, but I will pay more for better quality next time. I'm an experienced photographer and bought this for my 70-200mm lens. After 2 weeks, the lens of the filter separated from the ring and was loose inside between the filter ring and the front element of my 70-200mm. The worst part is that I couldn't unscrew the filter ring. I struggled to take it off fearing to cause damage to my lens, and finally I had to bend the ring to take it off (see picture) The filter is now destroyed and I'm really disapointed. I've used many many filters in over 15 years and I never experienced anything like this.

I'm old school: I always put a UV filter on my lenses to protect the front element. If you want to know how valuable that is, just look at how much less lenses that have "just a little scratch" on the glass sell for on FB marketplace or ebay - in fact, most people just wouldn't buy one.Bottom line, for the price it's a no brainer.As mainly a wildlife photographer, dust tends to be a problem; I way prefer wiping dust off a cheap(ish) UV filter than potentially scratching the coatings on my expensive lens.I have not noticed it on this lens, but most UV lenses tend to add the slightest, almost-insignificant, blue cast to any image. Since I would process any shot I consider decent and "worth it" in Lightroom anyway, part of my workflow would be to adjust tone - hence this is not a problem for me.Well worth it.

Build quality is okay; they seems solid enough, but have a rough surface finish.. They are very slim, not the slimmest I've ever seen but pretty close.On some of my lenses, these work well, but on some, they flare quite badly. I'm not an expert so I'm not sure why this is or whether better filters would have the same effect. I haven't noticed any other issues like blur or desaturation that are known to happen with poor filters.I haven't done any formal tests, but just eyeballing things these seem to be a middle ground between the really cheap filters and high end brand name filters. I can't justify them for the lenses I have, but if I had more expensive lenses I'd probably go for a Hoya or B+W.

This was a much more reasonably priced 95mm UV filter to fit a super zoom lens. The cheapest available elsewhere was around $200 so this was very attractive. I'm sure it's not the best quality, but for an amateur/hobbyist like myself it's perfectly fine. Also, for my purposes I want it to be there on the lens to protect it, so that if anything gets scratched it will be the easily replaceable filter and not the outer element of the lens itself. I will most likely remove the filter for most shots, so quality of the filter is not important.

My bad for trying to find quality products on Amazon in the first place. I assumed with the mention of "Japanese Glass" that the product was a solid, Japanese filter. Alas, it is made in China. I should have recognized it with all the bad English-isms including the fact that this will "protect my poduct". Would go to a camera store next time, for sure.