I bought this Sigma 95 mm protector to fit on an expensive lens (Nikon 500 PF) and it has been on since new. I have not had any issues with it and have not noticed any effect on image quality. Price seemed reasonable for a quality filter of this size.

I ordered the 52mm filter because the 30mm f1.4 sigma lens for sony e-mount cameras has a 52mm thread but after lens arrived, I couldn't fit it on.But after-service support was pretty helpful in telling me this

Let's be clear, this is NOT the best 50mm prime you can get. It's not even great in comparison to them. Arguably, that crown sits atop the new Sigma 50mm F/1.4 Art. Having used the sigma a bit (admittedly, not a lot), it's at least 200% better. Maybe 300% or more, but you'd have to be really adamant about some of the particulars. Make no bones, the Sigma is a tremendous lens. The thing is, it's also an absolute STEAL compared to the former champion, the Canon 50mm 1.2L, $400 more expensive at $1350. If you're following the math, I'm saying this lens is possibly 1/3 as good as a lens that costs nearly 8 times as much, and is already a bargain at that price. There's a reason it's the best selling lens on the market, for any camera system.Yes, your kit lens has 50mm in its range. But F/1.8 opens a whole new world of artistic expression for the beginning or intermediate photographer over the F/5 or F/5.6 that lens opens to at 50mm, and for the price, you'd be insane not to go for it if that even interests you in the slightest. And if $125 is too much to ask for your budget especially if you're a student, get a body $125 cheaper to make room for this lens.

Works very well on my Sigma 17-50 lens. Thank you.

Using this filter on Sigma 16 mm lens. One has to make sure it is screwed on well. Sometimes it loosens with the hood on.Other than that happy with item.

Product is compatible to 58 mm lens mount and working good till the time I test this one in open and edit my review.

I use this with s Nikon D7500 and a Sigma 600mm lens and it works perfectly.

Idéal pour mon Sigma 150 600 mm Contemporary. Prix un peu salé mais il l'objectif le vaut bien.