Very easy to take on and off which is exactly what I need when shooting video. I just wish the CPL was variable so I could change the amount of polarization.

I've decided to switch out my screw on filters for magnetic ones and this K&F Concept neutral density and circular polarizer kit is a versatile and great quality way to start.

The magnetic base screws on securely and it's so easy now to change filters on the go. Yet the filters stay on so well. They stack easily as well, something I tended to avoid in the past due to filters often getting stuck.

This set has really given me more freedom to experiment with different filters and combinations. I'm not noticing any objectionable color casts and the glass is extremely smooth. The metal is beautifully finished.

I've been able to use the included magnetic cap or a standard pinch type cap. The included storage case is super nice and convenient, I'd like to order another to contain additional filters. The whole kit is a great value.

The magnet is fairly strong and is not falling off.
The filters color cast is very minimal and the sharpness is not affected by the filter as far I can tell.

Good quality

Finally, you no longer have to run after filters that you can't install with cold fingers. Really good. The bag is also great!

Bought in 77mm I write a first after receiving it. The packaging is average. The magnetic cap is very good but complicated to remove with a lens hood.

Excellent quality filters and very easy to apply to lenses.

The filters from K&F-Concept are generally very popular, especially in terms of price/performance, and this magnet set follows on from that.
As a set with CPL, ND8, ND64, you are definitely equipped with the most common filters. Even if the ND64 is not enough, you can of course stack the ND8 on top without any problems and darken it even further. Of course, this is not as good as using a stronger ND straight away, but given the quality of the K&F filters, this is honestly justifiable, as flaring and color shifting are not a big problem here.
I think it's great that a magnetic lens cap is included. Especially if you use this set with other magnetic adapters for other sizes, you can forget about the normal lens cap. With the magnetic cap, however, you are very flexible here.
The magnets hold together really well, but you can still get the filters off. They are almost a little too strong, but it's better that way than if you can remove the filters very easily and they fall off quickly; that would be much more annoying and impractical.

A small bag is also included in the delivery. The bag is not bad, with a magnetic flap and also a zipper. Good combination, so you can close the bag completely when you put it away or don't need it that much at the moment, but if you are changing a lot, then you just leave the zipper open and just close the magnetic flap. For my taste, however, this could be a little stronger, I would be a little worried about losing the filters.

There is nothing negative to say about the quality of the filters, the coatings give a high-quality impression and are highly recommended for my circumstances.

I also think it's great that the back of the filter has no thread, so that it can be magnetically attached and removed without any problems. The front side is equipped with a thread, however, so you can still use non-magnetic filters that you may have.

All in all, a great set.
The price is of course not exactly cheap, but in my opinion it is still justified, especially if you can then use the set with the respective magnetic adapter on different lenses.

Great set similar to my free well that I got from a few years ago. These are not variable so there is no cast in the photos when you take them. They are just solid darkness and they are magnetic so you can swap or stack them on top of each. The magnet cover doesn't go over a hood but they work nicely with the cpl on my 70-200 lens. Great to use it during the bright days with a hood on which is the only set I found that allows me to use it with a 70-200 with a hood on. You have to find a thin thread that fits in the 77mm size of the 70-200 and be able to attach the hood on.

Installing the filters is super simple and quick, which allowed me not to waste time on site. The photos with and without the filters are day and night, especially for the reflections on the water and the sky effects. The only downside is the price which stings a little at first, but given the quality of the images, I don't regret my purchase. On the other hand, for those who like to control everything via their phone, there is nothing like it here, everything is manual.

The ✅ of this filter kit: