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.