I fitted this to a Sigma 500- 150. As a filter it works ok but I did bump the lens while in its padded case. The filter glass shattered, fortunately there was no damage to the lens itself but the filter mounting ring seems to have been bent meaning that it is impossible to unscrew it from the lens. If I ever do manage to unscrew it I will be replacing with something a bit more substantial.
22/03/2023
Just as good as any top brand item. Well worth the money to protect the glass on your lens
28/02/2023
27/02/2023
Note: I was provided this product free of charge by the manufacturer but no attempt has been made to influence my review.Tested on a Sigma 50-500 lens with an 86mm diameter, this filter fits nicely (although the thread is narrow so do it slowly to avoid cross threading). Tested in comparison to a Hoya UV filter I currently use I saw no noticeable difference in the photos produced. It is good value for money, but I did notice even in my brief testing that the paint did come off a little bit... I don't know how much of an issue this is, as I tend to keep UV filters on lenses as a means of protecting them.This does present one issue though with this filter. As described in its name, it is slim. Given my main reason for having the filter on a lens (especially a quite expensive lens) is to protect the lens if I accidentally knock it or drop it, I have reservations about something so slim... it just doesn't protect that much. I have a couple of lenses which have had minor accidents which are carried about with bent UV filters on the end, and I'm not so sure this one would help in such a situation.As a filter in its own right, I'm happy with this product.. but I'm not so sure from the perspective of a filter to protect the lens itself.
27/02/2023
Found this filter to be a good fit for the Sigma lens, came well packed with plenty of protection.For the price this is defiantly one to try.
16/02/2023