Bought it to use on my Sigma 18-35mm f1.8 lens. It's great and I've been using it on vacation. Comes with a free lens cleaner which is an added bonus. The case is also excellent and protects the lens filters well. Highly recommended if you are looking for 72mm lens filters. The product is well made and has done a good job so far.

I have other K+F filters for other lenses and they have been exceptional. I ordered this duo for the Sigma APS-C 18-50mm F2.8 zoom I use on my Sony A6000. When I stack both filters together, there are severe black corners. When I zoom from 18 mm to 19.5 mm, they are gone. If I use one filter at a time, no problem. So I decided to leave the polarizer on for the summer and reinstall the UV in the fall. Unless I plan to shoot 20-50mm on a given day. These filter rims are so thin that I don't think there is anything on the market that could improve this situation. I have put K&F on other lenses with no problems. Must be just this Sigma lens design.

Bought to protect the Canon 18-45 RF-S lens. Optically very good. I see no degradation in image quality compared to the lens with no filter attached. Good fit but note that it's slightly wider than the lens barrel so the EW-53 lens hood gets a little tight over the top, but it goes over the filter... easy! Because of this, I have chosen to leave my lens hood in place full-time, rather than taking it off and inverting it for storage.

Bought to protect the Canon 18-45 RF-S lens. Visually very good. I don't see any degradation in image quality compared to the lens that doesn't have a filter attached. Good fit, but note that it's a little wider than the lens barrel, so the EW-53 lens hood is a little tight over the top, but it goes over the filter... easy! For this reason, I chose to leave my lens hood in place full-time rather than taking it off and inverting it for storage.

bought this 72MM filter to support the Sigma 18-35 and it is now essential for my video productions. There is an analog effect that softens the images, the flapping around the lights is perfect and doesn't spoil the production quality. It is double-threaded to layer multiple filters and comes with a hard carrying case for safe transport within a non-slip triangle (can be used with different filter sizes). At the current price is a must.

It solved the problem of being able to use a Sigma 18-200 lens with a Pentax mount without an aperture ring on a Sony A6500.

Filter used on a sigma 24-35. Très pratique en variable pour faire des poses longue en journée.

Je cherchais un filtre de ce type pas trop char car ce n'est pas mon activité première ce genre de photo. Celui est parfait et pas trop cher !

The way I use this filter is by combining it with a fast lens like the sigma 18-35mm f1.8 art. I use this filter in combination with the fast apertures to blur out the backgrounds in broad daylight without letting too much light into the picture. If I want to make it lighter or darker all I have to do is turn a ring at the edge of the filter.

The only thing that gets me is when I turn it too much and it ends up unscrewing the whole filter out of the threading a little bit. But that's not a bad thing, its just a part of the experience.

I bought it 8 months ago. This has been, thus far, an excellent purchase.