I was a bit skeptical after the reviews that said that the filter was 0.5 mm too large and that a lens hood on the outside of the lens no longer fit. This is NOT the case at least with the Nikkor lenses 20 mm and 24 - 120mm Z with 77mm filter thread. Everything fits perfectly. I also couldn't make out the supposedly protruding groove on the 77mm UV filter. Visually everything is as usual with K&F 1a.

I only got these for the lens caps... I don't use the Keepers and already have an awkwardly sized bag full of new microfiber cloths as they seem to come with almost everything these days.

BUT since I have many lenses with smaller filter ring diameters that I size down to 77mm by using step-up rings so they share a common filter size, I often run into shooting with an unprotected 77mm filter on the end of mine rigs around.

This is exactly the quality you would want from them. Nothing fancy but perfectly functional and easy to use/operate with one hand without looking. The set of three is useful because I need at least that many and will definitely lose them over time in the black holes that are my pockets.

No complaints!

77mm polarizing filter adapted to a smaller 67mm lens. Fits :)

Rated 77mm Magnet Lens Filter Set
The lens filters come in a nice little pouch.

The magnetic adapter ring idea is pretty clever. Simply attach the ring and put the filters on.

As far as I can tell, I think the filters are of very good quality and also properly processed.

One of the best on the market. I use it on a GH five camera with the Sigma lens. It’s a must have.

77mm Magnetic Lens Filter Set. Good image quality and easy to change magnetic lens filters. It comes with a nice carrying case.

For beginners, the price is unbelievable and you also get a lens hood that costs more from Canon's original than this whole set would take in its place immediately

Works very well, I only recommend buying an additional lens hood because if there is backlight in the picture, it looks purple in the picture. Nevertheless, I am very satisfied, it does what it is supposed to do, I can't complain