Many voices will say, such cheap filters simply can't reach the quality of a brand filter and also I was someone who would have affirmed this immediately until now, so convinced was I of my B&W, Rodenstock, Haida and Co. filters. But now the surprise: the K&F filters do not show any conspicuities. No unnatural colour shifts, no clear loss of sharpness, hardly any flare or ghosting, 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.

My circular filter kit for each lens size includes a protective UV, a CPL and ND 10 and 6 stop. The K&F kits contain all but the 6 stop. The 6 stop can be ordered separately, though at this time only from the manufacturer's website.For any given size kit, the K&F Concept magnetic kit costs far far less than would top line individual threaded filters from other manufacturers (Breakthrough Photography, B+W, Hoya HD3, etc.). Yet the optical qualities of these K&F have been tested and are equal to the best. My own experience is that the K&F coatings are also just as effective at repelling water droplets as are my most expensive filters.Having used K&F Concept magnetic filters in two sizes for a few months I am loving the speed of filter changes and the absence of thread jamming when I stack an ND on a CPL.My only criticism is the lack of knurling on the front edge of the CPL frame. Magnetic CPL filters do not need or have a two piece construction. The entire filter is rotated in its magnetic attachment, which is fine but remains a two-finger grasping maneuver. To rotate the CPL you'll need to temporarily remove the lens hood. Maybe had K&F added knurling to the from edge a fingertip would suffice, but there is more friction opposing rotation than in a well made two piece threaded CPL. Off course you could attached your old threaded CPL to the lens, screw the open ring magnetic adapter onto the CPL, then add your NDs magnetically. You'd risk jamming the adapter ring to the front threads of your old CPL. I'm not going to do this.The protective UV is only meant to be attached directly to the lens threads. It is a lens protector. It does not magnetically attach atop the other filters or the open adapter ring. You are give two threaded adapters, one is just an open magnetized frame. The other has the protective glass. The CPL or ND can be clicked onto this protective filter, but not the other way around. My advice is to use the protective UV when facing blowing sand or salt laden ocean mist (and when shooting from a Russian reindeer sleigh where showered by flying feces).The included pouch is well made and easy to use. If you buy kits in multiple sizes you can even combine them into one pouch by storing the filters magnetically stacked and assigning each compartment of one pouch to a different diameter.

Very easy to use. The filters are easily exchanged and snap together firmly. As a drawback, the polarizing filter is not the most efficient, that is, it does not eliminate reflections as intensely as others.

I needed a more travel friendly set of filters to take with me on my hikes that would be too cumbersome to use my square ones. Having these filters in it's own soft pouch was perfect and it didn't take up much room in my camera cube. The magnets were strong as they held on while I was setting up my composition - sometimes in the rain and while on uneven ground.UPDATE 10/26/21: After over a month, I've already lost a CPL filter. Make sure the filter is flush in either the UV adapter or adapter ring. I was busily setting up my camera on a cliffside when I accidentally bumped my tripod and the CPL filter fell off.

They come on and off very easily and are very comfortable to use. A small drawback: the outer diameter is a bit large and rubs when removing the lens hood, so you have to be careful not to drop the filter.

There are reviews that already comment on how well they work, so I will not repeat them, simply say that it is a pleasure to take them off and put them on and they are of great quality. The ease of moving the CPL with the ND mounted or not is great. Totally recommended. The only thing is that it would be appreciated to have ND filters with a different graduation, an 8 and a 64 for example, and also one for light pollution on request.

The filters are great and can be changed quickly. Unfortunately, you cannot screw a graduated filter, even from K&F square and made of glass, onto the ring. The thread becomes larger. This means that you cannot connect the graduated filter with a polarizing filter. That is too bad

In addition to the square filters, I also bought the inexpensive magnetic filter holder set. All I can say is: great. However, I don't have the option of purchasing ND 8 and ND 64 (magnetic) because only ND 1000 and polarizing filters are available. A second glass-filled filter holder is included, which can be stored permanently with an adapter ring for a second lens size and still! fits into the super handy case. For now, this inexpensive set with a magnetic holder is enough for me; If I have further requirements, I will probably switch to the "large" filter holder system from another manufacturer (approx. 400 euros with three ND filters). Which photographer doesn't know this "want to have?" In short: Riko Best's post on YT convinced me. Would I recommend it? Yes, anyone who wants to work with a gray filter every now and then. LG

 I really like the concept of this set of filters. I’m not the most coordinated person, and switching filters in the field requires some coordination, so I have just been using a single filter - and it shows in my photos. I really like that this set really requires very little coordination. I’ve been able to quickly and easily switch filters as the lighting changes.The set comes in a nice padded fabric case with individual pockets and a Velcro strap to attach to a belt.The set includes three magnetic filters and an adapter ring. The lightest filter is a UV filter that looks completely clear. Like the adapter ring, this filter is threaded. It is the only filter that is threaded, and is also the only filter that seems a bit loose when on the adapter. The other filters fit much better, but they fit just as well on the UV filter, so I’ve chosen to skip the adapter ring and just thread the UV filter to my lens and attach the other filters to this one. It obviously means an added layer of glass when setup this way though.Anyway, I like this set and would recommend it.

I shoot in various elements and destinations where lighting is different and filters are needed for optimal results. I have been using the traditional screw on filters but I find it time consuming especially how it needs to be aligned perfectly on your lens, taking up to a few minutes for each one when I could miss the opportunity of my shot. I find this K&F filter set to be a great choice for me. I am no professional by any means and take photos for fun with my Nikon d850 and these filters have worked great for me. The magnetic adapter ring is easy to screw on the lens and the lenses stick to it well. These lenses work great in the rain and are not only waterproof but the water beads off of them. I have not had any issue of fogging between the lens and filter.The come packaged nice in a hard case, each in its own slot. I find this to be a great value for all of the different lenses offered in this set and I am extremely happy with them.