UV filters something many photographer takes for granted or think will affect their images when out in the field,I had previously purchased the K&N Adjustable ND filter that does away with the cross effect you normally get and I was so impressed I thought I would try out one of their UV filters to see how well it holds up to some of my others, first thing you will notice is that it is very slim "ultra Slim" Double threaded yet only 3mm in depth impressive indeed.you will also notice right away that it has some coating on the glass which blocks and prevents the harmful effects of UV rays and eliminates haze that can register a bluish cast from scenic shots.One if the most important features for me was to see if the claim that it does not affect image quality was true as many other filters have some slight effect on sharpness, and to do this I got the back of the box from the uv filter which has a high contrast of black and white and also had a light opposite and one to the right to test for glare effects, The result which I have posted down below, which was extremely impressive, I zoomed in at 100% and could not see any major effects to my image quality, least to say that with my own eyes I could not see any negative effect to the quality.I will let the photos speak for themselves.you will hear a lot of people say UV filters are pointless and maybe so with lower quality ones but I have had a uv filter save my 16-35mm lens when it fell, I also use them for my fitness shoots which I shot in a warehouse with loads of dust and when I use smoke grenades this prevents small particles entering the lens as well as settling on my elements.this filter also has notches to make it easier to unscrew, i know this is a nice welcome for me as i have to carry a flat balloon with me in my bag to help grip some of my others when they get stuck.below you will see two other filters which i have stacked next to the K&F concept these are also meant to be slim line, you will be able to see the difference in thickness and quality.Last but no means least the last two images are the before and after the filter was attached to prove that image quality is not effected.For £7 you have nothing to lose and lots to gain trust me :)

I needed a UV filter for my Canon 24-70mm lens. The filter is good fit. The quality of the glass is outstanding. The filter comes in a plastic container which provides protection when I take the filter off lens and store in my camera bag. This protects the filter from scratches when not in use.

Not a bad little filter, but did experience a weird fogging on the glass when I first installed this filter but after 3 with a microfibre cloth and lens cleaner seemed to have sorted the problem. Picture quality is ok but compared to my Hoya filters it’s not as sharp, but it’s marginal to honest.

New camera, new lenses so I needed the extra protection offered by a UV filter. I trust the brand so bought this one (and another size too). Happy with my purchase.

I think that this is another great offering from K&F Concept, the filter is blemish free and fits perfectly on the lens, with the thread making it a quick process to put on and remove if required. I have bought several Lee and Cokin filters in the past and this seems to offer just as good service as the more expensive brands

Very Good Protection for my Sony lens . Need to order another one for my second mainly used lens. Very happy with the purchase .

So far so good. Time will tell

got mine yesterday and said I would test performance with and without this filter. I have a vintage Minolta lens that was from my grandfather so it is very valuable to me and I wanted to avoid damaging it. As the title suggests, there is slight yellowing, vignettes, and a barely noticeable loss of sharpness that I can detect when viewing it on my computer screen, although the compressed images I've added may not fully show. Resolution of the original images. Let's break down what I found: The Yellowing - This filter has a slight yellow tint which makes sense, it's a UV filter so the shorter wavelength light might have trouble getting through. This isn't a problem for me as it can easily be adjusted and fixed in software after adding a little more blue, or this might get you better results in the field depending on your conditions The vignette - This is very easy though noticeable when looking at the same image with the filter on and off, again this is not a problem for me as it can be fixed or tweaked in software so that it is indistinguishable The sharpness loss - the sharpness loss is even at 400% barely noticeable, which is great. After that, if you just add 1 percent more sharpness, that's no problem for me. You have to view the photo at 200% resolution or higher to notice a loss, and even if you do see that, you have to look carefully. For what I paid for this filter, I'm happy to know that it doesn't affect my image in any way and that it acts as a shield, protecting my glass from scratches and dust. I will be adding more of these for my lenses and will not be forced to remove the filter to take a photo like I would with others. Great product, highly recommend!

Good protection for the lens, UV does the job, you can put the lens cover back on. Right price.

The UV filter has a high-quality and clean finish. I really like the blue-purple reflection and it really makes a difference. I didn't notice any changes in image quality, but there could be a slightly different, increased lens flare. If you like the look, you will be satisfied with the filter. In any case, I can recommend it as protection for the lens!