I love these magnetic filters. I did have to get some step-up kits for it as my lenses are NOT 77mm, but a step-up doesn't cost a bunch.

The magnetic attaching feels great and holds on perfect. Even swinging the camera around really quickly doesn't loosen the filter or let it fly off the camera which would be a nightmare. Was one of my biggest concerns switching over to these filters. The pouch it comes into is also wonderful to keep them all together. Glad I wont be searching for them forever or losing them. I've already recommend many of my photography friends to pick this up.

I'm a big fan of the magnetic filter kits - this is actually my second one from K&F Concept. The magnets are strong enough to provide secure hold, but are still easy to change without fumbling or fear of dropping. p

These diffusion filters create nice pretty effects in my test shots. I love how they look with warm light, but they create some really fun and cool effects with colorful studio-type lighting as well. I really am happy with this set, and I would recommend it.

In addition to square filters, I also bought the low-cost magnetic filter holder set. I can only say top. However, I lack the possibility of obtaining ND 8 and ND 64 (magnetic) because only ND 1000 and polarization filters are available. A second glass-filled filter holder is included, which is super durable with adapter ring for a second lens size and yet! fits into the super handy case. For the time being, this low-priced set with magnetic holder is enough for me; for further demands, I will probably switch to another manufacturer's “large” filter holder system (about 400 euros with three ND filters). Which photographer doesn't know this “want to have?” In short: Riko Best's contribution to YT convinced me. Would I recommend it? Yes, anyone who wants to work with grey filters now and then. LG

Among several domestic and foreign companies offering square filters, I decided on this one because it is easy to put on and take off from the lens, it is thin in the front and back, and it comes with a C-PL filter
For C-PL filters, just open the lid and drop in from above. If you make a mistake in front and back, it will not fit.
The square filter has just the right amount of friction and doesn't feel like it's going to fall off.
Almost all metal, except for the four metal adapter rings and C-PL filter, the holder alone weighs 110g.
In terms of design, the overall impression is sophisticated.

up until now, square filter holders from other companies have been expensive, and we have endured with SIOTI holders.
I also had an old K&F holder, but it is difficult to use C-PL.
That's where this product comes in. I bought a set of holder + C-PL + ND1000 for the time being, but it is well thought out. There is no vignetting even at 16mm with the Nikkor16-35mmF4, and there is no annoying color cast.
I'm a little worried about the C-PL's adjustment dial squeaking, but I have no complaints at this price with this content.
After that, I would like to see a frame that can be attached to the existing filters sold on the overseas official site, and a filter case that can hold about 6 to 8 filters with the frame attached.
~Addition~
I purchased a 100x150 frame from the US site of K&F. Existing filters can now be used, and full-scale operation is now possible.

I chose the K&F because other kits start at ND4 and end with ND32. The ND4 in places where there are usually fairly sunny days I don't see much use and the ND32 is a bit short at times so I decided to use at least an ND64 to be able to reduce the shutter speed further and I was right . The quality of the glass is quite good, with no color dominants. The polarizer does its job. You have to adjust it (with the wheel inside) to avoid reflections and you have to do some tests before you start photographing/recording so you have to land it to fix it. Happy with the quality of the product and the results. Although I would like them to have the option of a kit with an ND1000/ND2000 as well,

I like the quality of the materials. They're all metal. I have seen many kits but they are all plastic especially this one because the comments caught my attention.
The filter is made of glass and the quality is very good. The only thing I noticed is that it loses a bit of saturation and the white balance is a bit bluish, but it's easily remedied when processing RAW. They increase color temperature and saturation.
If you want to enter the world of filters for this price, please don't think about it. Excellent results.

In addition to square filters, I have now also bought the cheap magnetic filter holder set. I can only say: great. A second glass-filled filter holder is included, which can be held up permanently with an adapter ring for a second lens size and still! In short: the article convinced me. would i recommend it Yes, everyone who wants to work with a neutral density filter from time to time.