Surprisingly good for the price. Haven't noticed a negative effect in any situation. I use the filter as lens protection.

ran various tests under different lighting conditions. I didn't notice any chromatic changes or flair. Slim, light and the workmanship looks good. I suggest always using a UV filter, especially to protect the lens from dust, water and scratches. Given the price and first impressions I think this product is really good value for money. Amazon flawless as always in 1 day delivery. Recommended.

bought 4 filters: 3 of 67mm and 1 of 77mm. They came in a nice packaging (carton + a polypropylene box) Visually they all look good. To my eyes there is no visible drop in image quality with this filter compared to. The product looks good. I would give this product 5 stars if I didn't have major complaints about the mechanical part. The 77mm is almost perfect mechanically - a good match for the lenses I've tested it with. The first 67mm filter didn't fit my Canon 24-105mm F4 lens as well as my Fujifilm 18-135mm - it was impossible to screw it in due to the friction - just couldn't get into the thread. The second 67mm was almost perfect - a bit narrower than the Hoya HMC filter but perfectly acceptable. The third 67mm filter is narrower than the second, but I was able to put it on. I have decided to return the first 67mm filter and will keep the other 3 (2 x 67mm and 1x 77mm). Still, my thought is - was it worth the experimentation? I don't know it. The basic Hoya HMC is twice the price but is mechanically perfect. From another perspective, you could buy two of these and keep the one that fits...

High quality filter No distortion in my photos, which was not the case with the cheap filters tried before. I can just recommend her. Mikaël

It took me a while to get into it, but the lens is nice, works well and the pictures are nice.

The item received met my basic expectations. The glass filter (not plastic) is coated on both sides for anti-reflection, which is reflected in the green reflections. The filter frame was finely and precisely machined using CNC machines; it was easy to screw onto a lens. When I examine this K&F filter side by side with a much more expensive Hoya Fusion UV filter that I also use, I actually notice some differences. In particular, the green-tinted reflections of this K&F filter are more noticeable than the weaker reflections of the Japanese-made Hoya filter (which claims 99.8% transmittance). That's to be expected from the much more expensive Hoya, and it's also why I use it for a telephoto lens that I often use outdoors. However, I don't need the Hoya for every lens I own. I find this K&F filter pretty good enough for my less frequently used lenses and for most situations. (And if the situation is particularly prone to ghosting, for example, I know enough to simply remove the filter in that particular situation.) (I also liked that the included cleaning cloth came in factory-sealed packaging, just like wet eyeglass wipes . This gives me a little more confidence that the cleaning cloth hasn't been contaminated with tiny sand that could cause scratches. I personally don't use this type of cleaning cloth carelessly on filters and lenses, but it's a nice touch.) LIKES: - Reasonable price - Precise CNC machined filter frame - Anti-reflective coatings on filter surfaces, good enough for most normal situations. I like the balance between good enough quality and reasonable price that I find with this K&F Concept UV filter. It is mainly used to protect the lens from sand and dust. That's why I give this filter 5 stars. (Some filters on Amazon are now more expensive than a brand camera *lens* they are used on. That's not a reflection of quality, but 99% of marketing. Crazy.)

What can I say? The main requirement for a UV filter is that it does not affect image quality. After screwing it onto my compact camera, the photos look the same, and I can still put my lens cap on or stack other filters on top despite the thin form factor. It is great! The packaging was great too. The filter came in a hard case for storage, although I plan to just leave it on my camera lens for protection. If it gets scratched, don't worry — I'll just replace it! I like that it came with a large microfiber cloth for cleaning. It was very useful to clean both sides of this filter and camera lens before attaching it.

Very well made and good value for money. But... Unfortunately I had to return this to the retailer as the filter was a bit too wide to accommodate a lens hood, which was a very necessary requirement. The retailer readily accepted the return and had a very good free system for doing so. Well done!

I was looking for a filter that would not be too expensive to mount in a case for the GoPro on the motorcycle. I've already lost a few filters due to the vibrations. This filter not only screws well and fits perfectly, but also surprised me with its quality. In the videos I get in 4K I don't see any distortions or aberrations or lack of sharpness... I recommend this brand.

I immediately put it on a brand new lens and it fit well and I didn't see any distortion or lack of quality in my images.