For ND filters (without gradient) the concept seems very conclusive to me. Incidentally, the additional ring can also be used to attach another lens to the magnetic connection. The magnetic force seems strong enough to me, it's actually not that easy to remove the filter without shaking the camera. You definitely don't have to be afraid that the filter will fall off at the most inopportune moment. The image quality does not suffer visibly from the filter, as far as I was able to judge tonight. Because dusk was already setting in, I was only able to achieve the same brightness relatively soon with an increased ISO (no tripod with me...), which of course led to losses, but these have nothing to do with the glass as such. the first pictures, that could still be shot with different exposure times did not show any significant losses even in the 100% view. However, there is a slight discoloration of the image, which turns purple with the filter. (Supplement a day later: in daylight and light snow, the picture with the filter was harmoniously balanced overall (trick: no strong contrasts...) and therefore significantly "warmer" than without the filter)

This is such an elegant way to deal with using different filters. Instead of threading each on and off and hoping it doesn't get stuck when you're in a hurry, just snap them on and off with magnets.

Super useful with rotating filters like the gradient one included. I hope they have a CPL I can add to the kit.

Comes in a very nice sleeve case for all of the glass.

These K&F lens ND filters are great! What a concept to use magnets in this way! I really appreciate I don't have to screw and un-screw filters, saving time.

To me, the glass used is of good quality, very clean and undistorted images. The pouch is also of good quality materials, soft divided pockets on the inside, and durable outer shell.

In the video the adapter ring is already screwed on to my lens. I demonstrated how the filter just pops in place, and how it doesn't interfere with my Matt box. Easy on, easy off. Only thing I would add or change how I use these filters would be to get some soft gloves to handle the glass without dirtying them.

EXCELLENT CONCEPT, EXCELLENT VALUE!

I am very satisfied with the ND1000 filter. There was no color shift, no vignetting. I went out yesterday to test the filter. The most convenient thing about the filter is the magnet system. After focusing the composition without the filter attached, it was very easy to attach the Nd filter with a snap of magnetic force! I'm happy to show you my very first long exposure photos. Right around sunset time I was able to take a 3min 30sec photo with f16.

The magnetic adapter ring is a plus. You can even stack it with the ND filter. The case is also very durable and should be great for protecting my filter when tucked into my camera bag.

Overall I am very impressed with this filter. It's so satisfying how the filter snaps into place. This filter will definitely be a staple in my everyday camera accessories and I would recommend this to any amateur or professional photographer/videographer.

This is a really nice filter set. Good variety of stops and the gradient filter is really handy. I shoot in the Southwest and with the intense sun, these are a must have. The pouch is nice and really protects the glass. My only gripe is that it me some time online reading other reviews to figure out how to get these on my lenses. The adapter ring is with one of the filters which isn't obvious at first search. Once discovered, I liked how these just snap into place.

It takes quite a bit to get excited about ND filters. These things are pretty critical for me to be able to draw my shutters - but it's been pretty much the same over and over again - just with less color cast or thinner frames. However, the magnetic ones are a major change to my slow shutter workflow. I tend to work in very narrow apertures and often times and that is with the UV and ND filters mounted. I can't recommend these enough — especially at the price.

Fast delivery, filter keeps what it promises, top
What does an ND filter actually do? ...
If some should ask themselves that.
Quickly and roughly explained ---- little basic knowledge.
First and foremost, an ND filter reduces the incidence of light and so you can still film in very bright situations, for example. Without totally overexposing the recordings. So also a longer eg. shutter speed possible. Who doesn't know the great pictures of streams or waterfalls, where the water looks like a veil, like in a dream world. You get that with a good ND filter and exposure time, for example, and not, as some people think or suspect, with good Photoshop skills.
I work a lot on the water, on the beach, on the sea, and that's how I always get the water nice and smooth. And above all, since I have put down my roots in southern Europe, it is logical that I often have to struggle with a lot of sun, often more than desired, all year round and of course an ND filter is a must I almost would want to claim…
Well, just to mention a few small applications or possibilities.
With this filter you get very good image sharpness and color neutrality. There is no yellow cast like on many other cheap and often expensive filters. I already said about the X-Pattern and the IR Cut.
Conclusion: All in all, a filter that is worth the money and very manageable when you consider what you get for it. Clearly, on the whole, a satisfactory round package. Great for the price, you don't waste any money buying this filter.

For filming with DSLR. I find the processing good. No "X" pattern, I'm satisfied
I knew as soon as I opened the envelope that I had bought a quality item. The beautiful black outer packaging contains a round acrylic container that can be opened at the push of a button. The filter rests on its foam bed. It looks like quality, it feels like quality.

Anyone who shoots video with a DSLR knows the camera settings and their limitations in brightly lit environments. This can become a bigger problem if, like me, you like to shoot wide open on a fast lens. On brighter days it was almost impossible to take pictures outside. To say I am very satisfied is an understatement.

Pros:
High quality, no dreaded X's or aberrations. I expected a lens of this quality to cost a lot more.

Cons:
To be honest, there aren't any. No, I can't put the lens cap on with the filter in place, but unscrewing it and putting it back in its case is no problem.

I'm just an amateur filmmaker so my word doesn't stand for photographers. However, from a filmmaker's perspective this is a great kit in the bag and for the money you can't go wrong.

WOW WOW WOW. That's an incredible idea. I'm really surprised I've never come across this concept before or that no big companies do.

First let me say that a week ago I went on a trip to Mammoth Lakes and did a lot of long exposures, so I had to screw on my ND filter and then take it off to take another shot in the same spot, it can be very annoying .

The filter was well packaged in a nice little bag. It doesn't come off easily, you can definitely shake your camera as hard as you can and it won't come off.

All in all this is an amazing idea and I've been looking for light pollution filters for the amazing Milky Way shots I'm taking, unfortunately I can't get these before the 21st of this month. As soon as I do that, I'll upload photos here