First of all, I am a fan of K&F Concepts. So far, everything I have bought from them has been of good quality. This filter is no exception. Fits my camera perfectly and to my eye it causes no abnormalities. I can't detect any color cast and the sharpness is not affected. I bought it to protect my lenses when I shoot handheld in harsh environments like construction sites, which I do often. I am very happy with this filter and will continue to be a customer.

The protective filter fits very well on the camera lens. It can also be attached very quickly using magnets. The image quality is not affected by the filter.

This magnetic 77mm MCUV filter from K&F Concept is extremely clear, distortion-free and free of color cast, as far as I can tell from the resulting images. It fits on my Canon 85 1.4IS lens thread and can then be covered with magnetic filters of the corresponding size. Beautifully made and processed, a real bargain.

I love K&F Filters... They are affordable, do exactly what I need them to do, and are easy to source and replace when needed. HIGHLY RECOMMEND!!!

Actually, you don't need a UV filter anymore these days, because camera manufacturers have been installing such a filter in front of the sensor for many years. However, there is one application in which a magnetic filter is useful and practical: If you have already fitted your lens(es) with a magnetic filter adapter, then a lens hood will generally no longer fit. However, this offers the best protection against, for example, accidental bumping. Without a gel, the front lens is exposed. And that's where this UV filter comes in, but a neutral glass filter would have done just as well. Now, filters generally have a negative effect on image quality, the only question is how much. This filter is very cheap at around 20 euros (67 mm) and I think the quality is OK. Flares (backlight that leads to unwanted reflections within the lens) seem to be much stronger to me, but it depends a lot on the lens anyway and a lens hood is always better than a better filter, unless you can avoid flares or even use them deliberately. There are two aspects of handling that bother me: the filter box is designed for much larger filters (I estimate 82 mm) and does not have a suitable recess for this 67 mm filter. This means that not only is the box much larger than necessary, but the filter also rattles around in it during transport. Solution: use your own filter bag, in the right size. The magnetic holding force between the filter and the lens adapter is weaker than that between the filter and the front cover. If you take the front cover off, this UV filter is always attached to it. For 20 euros, this filter is extremely cheap, technically/optically OK, but in practice it does show some small weaknesses. The fact that you basically get protection that can be removed quickly and that you don't have to spend a long time screwing on makes the filter still worth recommending.

I got the filter for the 55mm Sony/Zeiss lens. The front lens is set back here... but you never know. In any case, the glass is high quality and well coated to allow for high transmission and few reflections. Even in poor lighting, I don't see any flares that wouldn't be there without the filter. I can definitely recommend it.

I'm actually a fan of K&F products, but this time I'm disappointed. My lens hood doesn't fit the lens when I've screwed on this UV filter. That bothers me so much because I want to reduce flares with a lens hood, especially when there's additional glass in front of the lens. My older UV filter from Hama, which I always used to attach to the Sony 28/2.0, proves that this can basically work. But it's not magnetic and so can't magnetically hold other filters. That's what I found so appealing about this one from K&F. Apart from that, you get a UV filter of the usual high quality at a reasonable price. If you don't use the lens hood anyway, you can certainly buy this one without hesitation. I'll probably only use it rarely.

This UV filter from K&F is basically good and does what it's supposed to. The glass is very clear - I was confused at first because I couldn't even see it in the filter frame. There is no impairment of the image quality and the filter is therefore ideal as additional protection for the lens. Although the magnetic mount is actually practical: due to the slightly wider edge, I can't use the lens hood at the same time (at least with a Fujinon 18-55mm).

Great protective filter that is stackable. I've never used a magnetic filter before so I'm looking forward to trying some that are compatible with it, but in general this is a really solid protective filter.

Recognized brand in the world of photography that offers increasingly quality items. This filter is perfectly adapted to my 52mm diameter lens, allowing me to protect it from bad shots, splashes or dust.