The filter is mounted directly on the lens. You can always take it, it is not heavy and you will get great effects with it!
Practice & optical quality:

many voices will say, such inexpensive filters simply can not reach the quality of a brand filter and also I was until now someone who would have immediately affirmed this, so much I was convinced of my B&W, Rodenstock, Haida and Co. filters. But now the surprise, the K&F filters show no abnormalities. No unnatural color shifts, no clear loss of sharpness, hardly any flare and ghosting susceptibility, simply nothing where I would say at first glance that it would be a reason for exclusion. And I think this fact has opened my eyes. Either K&F has found a manufacturer here who also does this for the brand companies, or as I think, they have simply inserted a second layer in the factory and instead of the brand name, simply lasered K&F on the filters.

For now, I can express an opinion only at first glance” very neat packaging, very well done bag for storing filters, also with magnetic closure and well-made compartments.
Filters with strong magnetic attraction, which can be attached to the adapter, but which can also be magnetically superimposed on the UV filter, for those like me who leave it constantly mounted to protect the lens.
I strongly suggest buying (separately) the magnetic lens cap, although it is too expensive. But it is a useful complement that is still worth the expense...

I have loved that they are magnetic, because it is much faster to change one for another or remove them without having to screw them.

I constantly wear the UV to protect the lens and when I want to subtract a couple of steps of light or there is water, I leave the CPL fixed.

They have good quality and a reasonable price.
I have tried the variables and there is no color ; much better these, and I forget about the vignetting.

The ND 1000 is very correct also for long exposure.

I miss that the magnetic metal cover does not come in the kit, in the end I bought a loose ND 64 filter, to be able to have it and I love the speed to have the camera ready.

This is a more than successful set that is worth every euro, not only for newcomers to the subject. Ambitious users will also find a good alternative to the filters of the established brands.
It really remains to hope that K&F brings more of these magnetic filters on the market, because I would like to have another ND8 and ND64.
Therefore, I can, with a clear conscience, give a very clear buy recommendation.

I have bought and used a number of K&F CONCEPT product for my photography over the years and have always found them to be a great balance of quality and value, and this lens kit is no exception.
I think it's an awesome basic filter kit for landscape photographers.

Just when you thought....who would reinvent the wheel? K&F has def done it! I have the swarm of traditional filters and always screwed them on and off, carried them with me etc. All the standard ways we are all use to. This caught my eye when I saw "magnetic" and though.....eh, seems odd.

But im always up for and easier life when it comes to those little things so i gave these a shot. And now, I find if i had to screw on my filters, it would drive me nuts. This is a MUCH MUCH better mousetrap to the filter game! I find myself swapping filters more often, and using these more than i usually would. The magnets are strong and the filters are what youd expect from them. So far i am LOVING these. They clip on easy, you screw on the magnet ring, and then the filters clip to it. Your lens cap goes on the filter, so if you dont want the filter, i tend to take it with the lens cap and put it to the side until i need it.

If you use or swap filters a lot, do yourself a favor and get these! Im about to order a few more sets for my other lenses.

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.

K&F Concept’s Magnetic Lens Filter Kit, which includes a UV filter, a circular polarizer, and a neutral density filter, along with an adapter ring, is a good concept that isn’t quite executed correctly. The idea behind a magnetic lens filter kit is a good one, as it’s never fun to fumble around changing filters when you are trying to get a photo, especially if you are hiking and not in a position to lay down the camera on a clean surface and carefully remove and replace filters. I tested this kit with the Nikkor Z 24mm-200mm lens, which takes 67mm filters, and removed the existing UV filter I had on the camera. The adapter screws on fine, but now with the K&F Concept adapter on the lens, the lens cap falls off easily. The situation improved slightly with the addition of the K&F circular polarizer on the adapter, but the cap still did not stay in place. I even tried keeping my original UV filter on the lens, along with the adapter and then the circular polarizer, and the situation did improve a bit, but I don’t like having a double layer of glass in front of the lens element. I also tried the adapter with an F mount lens with a 67mm diameter, and the result was a little better as F mount lenses have different lens caps. The filters themselves work well and seem to be of good quality. Included with this review is a photo taken with the circular polarizer. The filters themselves are very thin, which is perhaps why the lens cap does not stay on, and the movement of the circular polarizer is smooth. The filters come with a nice carrying case as well. Bottom line, I like the concept of magnetic filters, but, at least with the Z mount 24mm-200mm lens, the adapter and filters are too shallow for the lens cap.

As a landscape photographer, I found this filter system really interesting. Unlike screw filters, these filters can be applied and removed in a fraction of a second, while unlike plate filters they are much less bulky, lighter and, of course, much quicker to install. The K&F Concept Nano Series magnetic filter kit is extremely practical. The case containing the filters is compact in size, which allows us to carry it in our backpacks with very little space sacrificed.
The weight is extremely light, which is really useful for long excursions where the weight of the equipment starts to be felt after several hours.
The installation and removal of the filters is lightning fast, to say the least; in a matter of seconds you can easily fit all three filters and, in just as many seconds, remove them.
The holding power of the magnets is really good and therefore there is no fear of finding yourself with filters that fall during shooting or transport.

INTROI bought these filters to replace others I already had (always K&F concept always purchased here on Amazon) to have something practical, comfortable and light to carry with me that would adapt to my new outdoor philosophy and family needs (practicality and lightness). What I discovered was a wonderful surprise. These filters and the case they come with are not only practical but are also well made, have good optical performance and do not present chromatic aberrations. For me they represent a real REVOLUTION and now I'll explain why...[