K&F CONCEPT 82mm UV Filter Ultra Low Reflection Protection Lens Filter, Slim Lens HD Optical Glass 28-Layers Coating Scratch-resistant, Ultraviolet Protector Filters for DSLR Cameras (Nano-X Series)

This "professional" Nano-X filter is thin and well made, the ridges on the sides that make it easy to screw on and remove are a great feature. I also have the cheaper "beginner" version of this filter from K&F's Nano-K series which is also very good, and one-third of the price. Whether this one is really three times better is anybody's guess, but it feels reassuring to have it on a better quality lens.

Bought these to add to my camera lens as I was starting to worry about the risk of damage or dirt on the front element. Having used the camera for around two years prior to adding this filter, I can say with confidence that I don't notice any degradation in the quality of the output (and this on a 47MP full-frame camera with a very well-regarded 28/1.7 lens). So, from the perspective of optical quality, I wouldn't worry about it. From the perspective of longevity, I consider it a fit-and-forget thing, so don't expect to remove it often (if at all). The actual body of the filter itself seems well made and I wouldn't expect any issues with it, though can't comment on how it might stand up if you were removing it regularly. For the price paid, I'm happy with my purchase.

Does exactly what I need it to do, great packaging, no impact on photos and protects my lens from scratches. Easily comes on and off, worth paying the extra for this premium filter.

I dont often write reviews but I had to do this one because I used to think K&F glass was poor quality because they tend to be cheaper. I was wrong, If you’re buying any K&F filter, You gotta buy the Nano X Series. It’s fantastic Glass. When I got my Fujifilm 23mm F2 Lens i wanted to cover it to prevent scratches and possible breakage as this is my daily camera and it takes a beating hanging and swinging from my neck all day. I saw the Fusion One Next Protector From Hoya, the reviews were good and the price was high, I believed it was best, but while using it i could see the glaring in low light like a thin layer of white over photos. Yes it’s not enough to ruin a photo but if you care about details you’ll notice the difference. I have other Nano-X mist filters and NDs so i decided to try this one. I did a test in a controlled lighting environment in manual settings to test both uv filters and the K&F nano X came out cleaner with the glare. It fits well note, the purpose of this is to protect my lens, nothing else. I’ve included photos from the test but i doubt you’ll be able to see it as the quality will drop from uploading.

UV filters are an important asset on telephoto lenses, especially during humid or hazy summer conditions. Especially important is their construction and non reflective qualities, and nil effect on overall sharpness which this filter excels at.Images enclosed are with 180-600 Nikkor ZVR

As always as I own a few filters, cracking quality

This is a nice filter, the anti reflective coating is one of the best I’ve come across and it’s nice and thin so doesn’t vignette on wide angle lenses. Well worth the money.

I got this to help with lens protection on a telephoto zoom lens.Have been using it for 24hrs in this glorious winters sun light and have had no issues with pictures I have taken.Need to give it a full workout, but based on prior experience with this make and this level of coating, I'm not expecting any big / medium issues.Looking forward to using further.