Both lenses are Sigma lenses with 2 different brands of UV filters on them. The lens on the left is my 150-500mm with a different brand filter. On the right is my 150-600mm lens with the K&F filter. The left lens looks a little blurry, but the K&F filter doesn't. Doesn't reduce the picture quality I can tell. You can feel it's weatherproof, but I'm not testing it to see if it really is. Comes in a plastic case No complaints so far.
14/12/2022
I don't know how to describe it, but this UV filter is shockingly clear. It's like it's not even there, but it's there, and it looks beautiful too. If you've ever seen the glass that Apple stores use for their stores, so be it (Apple uses special glass for all of its stores and headquarters that's remarkably clear). This filter is like that. Haven't had it long enough to see if it really withstands scratches, bumps, water etc. but just from the first feel it seems like it does what it says on the tin.
13/12/2022
Very happy with this one, feels much safer carrying my lens around and don't have to worry about dust or water or anything anymore. Perfect easy fit.
11/12/2022
This lens filter is wonderful!!! The clarity I get with it is amazing. I plan to slowly put these on all my lenses.
10/12/2022
Use it as a protective filter, no noticeable degradation on the Sigma 150-600 FE.
08/12/2022
bought this filter without the knowledge of the company. I still don't know anything other than what I've observed: it appears to be of quality construction, and most importantly, I took it out to shoot and the clarity and visual performance of my favorite wide-angle Nikon lens remains just as superb as always. So a quality filter at a very good price.
07/12/2022