Very easy to use. Filters are easily exchanged and fit securely.
As a drawback, the polarizing filter is not the most efficient, that is, it does not eliminate reflections as intensely as others.

I use it for a Sigma 24-70mm Art and it's thin so I don't have any vignetting.

I like how they are easy to use and saves me time and frustration from having to switch lenses.
I do wish that I could use my K&F 150x100 square filter holder with this kit.
It’s unfortunate that K&F did not create this kit with the thought of using it with the square filter kit though.
I do use a UV and CPL circular filter with my square filter system at times and not to be able to connect my K&F 82mm filter holder ring with this is a bummer.
I’m surprised it doesn’t work with it or that it’s not able to screw onto the magnet filters in this kit.
K&F please fix that in the future.

They are amazing lenses

Bought for long exposure works well so far

Conventional use of the UV filter. Polarization and ND filter.

I love that this set includes UV, polarizing and ND filters all in one set. Comes with a storage pack. Very easy to attach. I love the magnetic attachment. This is so much easier than screwing on each filter. After having another brand and type of filter getting stuck on my lens, this was a welcomed change. Great innovation. Great glass quality.

Admittedly, the system of magnetic filters is not entirely new and I cannot say who copied from whom, but I already know K&F from their very good lens adapters and solid tripods. And since I've been flirting with magnetic round filters for a long time, but up to now the prices for such a system have seemed too steep to me, I was of course interested that K&F now also offers something like this.

For the price great, i reaaly like it.

As a photographer, I use filters, but it's not always easy to put on or take off depending on the situation. But with this system, it becomes so simple that it's almost instantaneous.
The product is of very good construction quality and it comes with a very well made and resistant 4 pocket pouch against possible knocks. It can be attached to the belt with a Velcro. The kit is composed of two screw rings, one UV and one vacuum on which the CPL filter or the ND1000 can be fixed.
I really wanted to go and test this new product. First with the CPL filter alone and then with the CPL filter + the ND1000 together. The results are just astounding. Here are the renderings with the CPL filter on the left and the CPL + ND 1000 on the right. With the filters, there is no loss of sharpness, and color drift is almost zero. The CPL filter polarizes perfectly and the ND 1000 filter is very surprising in terms of its performance, it is very thin which limits vignetting, a plus. By using the two together, it is better to avoid ultra wide angle focal lengths, but from 16mm, no worries, you can add them. In addition, they are compatible with my sun visor, I was able to put them on and take them off without having to take them off very easily because the magnetic force is perfectly dosed.
Really very satisfied with this first release, I hope that other intermediate magnetic filters with this system will be released soon to complete the offer.
If there were magnetic lens caps, that would be awesome.
It is a very good investment and the price is more than correct given the quality and the results obtained.