just bought this filter as insurance for the front element of my 70-200 f/2.8 VR lens. I've bought a few of these now in various sizes, and as long as you're careful not to over-tighten them (they're SUPER THIN and don't hold on easily), they seem to work just as well as the much thicker and more expensive multi-layered B&W filters. K&F usually has good quality, and these filters are no exception. If you get vignetting with this filter, you'll get it with ANY filter. I've never seen anything thinner. I also like that you get a neat little storage case, and the lens cap is just as good as the OEM lens caps I have. I'm not sure what you'd need the little lanyard for (at least as far as filters go), but the included microfiber cloth is also appreciated. In the balance between protection and utility, this filter definitely leans toward utility. It protects my front element from dirt, dust and smudges, but maybe not from strong mechanical shocks. On the other hand, it is lightweight and will never make your image corners look dark. If you are really rough with your equipment, you may need a thicker filter to protect the front of your lens. However, if you value good optical quality and minimal weight, this filter should be at the top of your list.

Barely received, already tried. This filter fits perfectly with my Nikon lenses (16-85 and 70-300). No image defects and good front lens protection.

I've become a huge fan of K&F Concept. It's hard not to consider the cost of this line of filters. This is the first filter from this line I've gotten, all the others have been either the Nano or top-line series. The filter is almost disappointingly light, especially in the 52mm size I got. It has very deep grooves that really make it easier to grip — and they don't add to the overall diameter, so if you have a slide-on cap or hood, they won't get in the way. It's also very thin, which is a good thing — but is also my only complaint about the filter — the internal thread (on the front of the filter) is too shallow to accommodate the OEM lens hood designed for the Nokton lens I use it with. It kind of holds it, but it does wobble and play a bit, so I'm baffled by that. I tested it with the ~10 year old German "pro" level MRC filter that's been on the lens since I got it, and it's visibly a better filter in terms of overall contrast. (K&F's elevation filters are even better in this regard.) And for that cheap price, you get a lens cap and sealed cleaning cloth. The lens cap I bought separately was also the first K&F product I used that I thought had a flawed design, and this smaller one is too — the recesses for your fingertips do have plenty of depth on the cap, but the surfaces you squeeze to use the cap are completely smooth, and I have trouble using it. I was able to fix that by gluing a very small (~0.02 x 0.06) strip of plastic along the side edges of the pinch points, which makes these work really well. So — even at 4 stars (a high rating from me), there are things I don't like about this filter kit. But I don't think the shallow threads will be an issue for most people, and getting a really good filter for so little is worth a star to me.

Using with my Sony E 11mm 1.8. The lens cap is also a nice bonus.

EVERY LENS SHOULD HAVE A UV FILTER FOR IMPACT PROTECTION. NOT THE BEST QUALITY BUT IT WORKS FOR A LENS I WILL ONLY USE 10-15 TIMES A YEAR. CANON R3