A dirty filter arrived, it wasn't just dust and after 10 minutes of cleaning with a special liquid and a lot of attention, it went away. I contacted the manufacturer and after a few days he replied and sent me a new filter to replace, recommended!

I bought this filter to replace a damaged one. I had a good time and bought the same brand. The filter seems well made to me and the pleasant surprise of the knurling. I've always had the problem of not being able to grip when my hands are cold.

Light weight and do the job

bought this lens filter because I was looking for a filter no thicker than 3mm that would fit in a new Haoge lens hood (which cannot take thick filters) for my X100V to protect the lens and the camera to make weatherproof. If you don't know anything about the new X100V, you need a filter that is weatherproof. After some searching for a 3mm thick filter I found this filter from K&F Concepts on Amazon. I was skeptical that it would only cost £5.99 and there have been some complaints of a color cast. However, I thought I'd give it up for the price. The box it arrived in isn't the best, but it did its job and the filter arrived unmarked. I held it over a white surface and I could actually see a slight shade of brown. However, I don't see any color cast in the pictures. If you hold the filter up to the light you can see a purple reflection. I have tried to show this in the pictures but there is some fading. It looks very similar to the anti-reflective coating you have on glasses - I don't mind that. Overall I'm amazed, it's actually a really good filter with good spread and no obvious ghosting — I shot in the sun yesterday and it worked really well. I've bought far more expensive filters in the past that weren't as good. Recommended — consider buying a second one as a spare!

Admittedly, this filter comes at a very reasonable price. But on the other hand, it does its job perfectly. It protects the sensor from UV rays that burn the colors in the photos. You can see the result in my photos without retouching. I am completely satisfied. The blue sky isn't gray anymore, that's great.

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...

I like filters that protect my lens, don't cause a reduction in image quality, and don't cost me a lot of money. This lens does the job and does it well. Recommend!

A UV filter can reduce the effect of haze, enhancing the color and clarity of an outdoor image. It can also provide protection for a camera's lens. Ultraviolet, or UV, filters are available for a wide range of prices. This K&F Concept filter provides excellent results for a moderate price, in my experience. And, my experience includes several of them.

Great protective lens. Really easy to install. Simply screw to the front of my EF-M 15-45mm f/3.5-6.3 IS STM lens. So much cheaper than buying one at the camera store. I don't have to worry as much about scratching my lens now. Didn't notice any difference in picture quality. The lens cap also still fits perfectly over it.

I bought this filter to protect my camera lens from dust and the elements. It fits my lens perfectly and comes in a protective plastic case. Very happy with the extra protection this filter provides for my camera lens.