Pros - Easy to install and remove - Magnetic adapter ring is compact enough to leave installed on lens - Magnets work with other brands of magnetic lens caps and filters Cons - Circular polarizer filter sometimes doesn’t seat itself fully flat on the adapter ring, need to press down firmly to ensure a flat install - Magnetic adapter ring doesn’t have any thread or place for a lens cap to grip, so lens caps fall off easily This circular polarizer system is a great way to quickly add or remove a filter. The magnets hold well and also allow the polarizer to rotate smoothly to make adjustments for optimizable polarization. I also have some Kase brand magnetic filters and lens caps that work with this system, and that was a nice bonus that they’re compatible. The adapter ring doesn’t have any threads on it to help a spring-loaded lens cap to grip. That means lens caps will fall off easily when attached to just the magnetic adapter ring. The solution is to either install the circular polarizer filter with the lens cap or buy a separate magnetic lens cap that can attach directly to the adapter ring. Personally I like the magnetic lens caps. As with any circular polarizer filter, you will lose some light and will need to compensate to brighten your exposure back to normal.

These magnetic filters are awesome. No more worrying about the lens threads on the camera. If you've ever had a filter get 'stuck' on the lens, you know how frustrating that can be. With the magnetic filters, you can swap out the filter in about 10 seconds. I personally think the lens clarity is excellent. Very happy with this filter.

Glass is clean with no imperfections. The ring is machined perfectly and slides on to a 82mm Sigma art lens perfectly. 5/5 stars

I've absolutely loved all of the filters I've gotten from K&F. All of them have been perfectly clear, packaged great, and threaded perfectly across each setup I've used them on.

The main advantage of this filter is the adapter ring and the filter itself adheres to the ring/lens magnetically. As to the performance of the filter itself, it works as you expect a polarizing filter to perform. The ability to place and remove the filter quickly is the main attraction to this kit and sets it apart from its screw-on/off counterparts. So far no issues with the optical quality of this filter. K&F is a go-to for me when looking at filters and this one is of the quality I have come to expect from them.

Love the magnetic lens! It works brilliantly and the filter is a nice quality. So far, we are happy with this! A great value and price!

recently received two K&F lenses. I've never used the brand before, although I have heard of them. I decided to try it on and my my, its a great filter. No issues. Good for shooting through glass or water. I think the price (very low) has held me back from the brand under the *false* assumption that their filters were less than. Turns out I wrong. They just have great filters at a great price!

K&F continue to make great stuff. Fantastic CPL, seems to work with some other magnetic filters I own

have to say that I am glad that I did, as the filter is very high quality and yet affordable. This filter features an aluminum filter frame, and multi-coated front and rear optical glass elements and comes with a magnetic filter mount. The quality and workmanship of the filter were evident once we received and checked it. The filter glass remains clear and free from scratches, fingerprints, or any other marks, the magnetic mounting ring provides a secure connection to my lenses and does not move or vibrate, and the polarizer dial turns effortlessly. The leather storage pouch that comes with it is also a plus when it comes to maintaining the condition of the filter when not in use. When I affixed and applied it during some of my photography sessions, particularly landscape ones, this filter performed perfectly in darkening skies, eliminating reflections, and boosting more saturation and contrast in my shots, just as an effective polarizer ought to. The multi-coatings also contribute in minimising flaring and enhancing transmission of light. Because the frame depth is virtually paper thin, it’s possible to stack them behind other filters with no loss of image clarity due to vignetting. In summary, I am satisfied with the characteristics of this magnetic circular polarizer by K&F Concept. I was very glad to see that it provides all the utility I would expect for a filter in a much higher class and a much more expensive brand name.” In conclusion, for the photographer in search of a good CPL filter that is slim and budget friendly, this is an excellent option to go for.

have never had a single issue with K&F lens filters...so when my decade old lens filter got scratched...I knew just where to go. Fast shipping as always, great quality, good crisp image...what's not to love? Will keep getting them.