The K&F Concept DJI Mini 3 Pro filters make for great footage. The filter I had was the CPL32. Installing the filters is easy by yourself (see video). Simply twist the lens filter if one is on to remove it. Then take the filter you want to install and place it at a slight angle. When it is flush with the lens, give it a quick twist. It is so easy. I have attached a short video showing the installation process.

The 3 filters come in a plastic case for convenient storage of the filters. However, you cannot use your standard drone lens cap as the body cap does not close.

In addition to the filters, you also get a set of propellers with a screwdriver. I'm not averse to using third-party propellers, but compared to DJI's own-manufactured ones, there's a certain level of dread in using them. Just for completeness, the props don't look as good quality as the originals and probably aren't, but they aren't bad quality and I'm sure they would work just as efficiently as the DJI equivalent, but I do maybe just stick with the DJI with my 400lb drone. Having said that, I consider this to be a gimmick and doesn't add credence to the filters, which speak for themselves anyway.

In general I found the K&F filters to be very good and satisfied with the quality of the filtered videos they produced, although on a few occasions I did notice a slight reflection of the sun, in the form of a line going down the screen and another in one other video but these were on screen for a split second but I didn't notice anything with no filter enabled.

In summary, while there was an issue with a fraction of my video, possibly due to the filter, I can't be sure I would still rate these filters as a good buy. You get 3 CPL ND filters and they are good quality. You get the propellers too, but definitely not the same quality as DJI's own. But for £35 you get a lot for your money so I'd definitely give them a try.

Update: Referring to the shadow in one of the videos. I've since seen similar solar flares on other drone videos, so I can conclude that this isn't a fault with the filters themselves.

The K&F Concept ND filter set is rated in ND 8, 16, 32 and 64 for DJI Mavic 3 Classic.

The filters come in a small plastic storage case. Inside are the 4 filters, embedded in a foam rubber mold. Thanks to the foam rubber, they remain reliably in place and are well protected from scratches.

The filters themselves consist of a metal frame and tempered optical glass.
They are included in 4 different strength classes. For most purposes, the filters should be sufficient to be able to increase the shutter speed of the drone as desired, thus creating a cinematic motion blur in the image. Or simply to be able to correctly expose the image.

The filters have a very good workmanship. They fit the drone's lens with millimeter precision. The closure of the filter holder snaps gently into place. The filters can also be easily turned down again.
I really like that the filters are made of metal. In addition, one weighs just 8g, which does not change the flight characteristics of the drone.

The compensation is excellent, the filter has no color cast.

Conclusion
In my opinion, the K&F Concept ND filter set is a very good product. The filters are cleanly processed + the set is thoughtfully put together. Long exposures with ND256 or higher filters will not be done from the air anyway, so I think the ND 64 is the all-purpose weapon for very bright environments or very long shutter speeds for motion blur.
At the time of my review, the price of the filter set was around EUR 50, which in my opinion represents an excellent price/performance ratio.
So I'm giving it 5 stars and I hope my review was helpful.

I've had the DJI Mavic 3 Classic for a long time, mainly to take nice pictures and 5K videos on vacation.

I filmed without a filter for a while and was always amazed at the inconsistent quality.
Personally, what bothers me the most is that I can't film properly against the sun without the glare constantly interfering with the recordings.

The K&F Concept ND/PL filter set seems to be the solution to my problems.

Actually, I wasn't really aware that there was such a thing for my drone.
But I didn't really look for it either, because I rarely use the drone.
Of course, it has to be emphasized that the DJI recordings are simply very good even without a filter.

But once you have started working with the individual filters, the sometimes extreme difference in the recordings becomes clear.

With the different filters, which are also made to fit very precisely and without any optical defects, the images are optically much softer and more even.

When shooting in direct sunlight, the glare is no longer so extreme, but rather soft and balanced.
In particular, shots taken in snow or over water with strong reflections improve visibly.
So I no longer have to edit my films with my software afterwards to reduce reflections and glare.

The filters can be attached with a slight twist and are super secure!
In terms of quality, the filters could also be an original product!

In terms of weight, nothing serious has changed either, since the control of the gimbal still works very well.

The Mavic 3/Mavic 3 Cine Drone variable ND filter is well made, easy to install and use, and nicely packaged. Compared to filters bought on other platforms, K&F does a great job!

I had actually used the Neewer ND filters for my DJI drones and GoPro for years and was always satisfied with them. Now I have also received this one from K&F for my new Mavic to test. Delivery was quick thanks to Amazon.

The filters fit the Mavic 3, which is also available from Neewer. There is not much difference in price between the two sets. K&F are a few euros cheaper, but also offer quasi-integrated polarization filters. The filters are all top-quality and sit firmly on the camera body. Even with a lot of action and turbulent scenes, there is no need to worry. The filters remain reliably in place.

With the ND filters, the exposure time in bright sunlight is extended and the pictures simply look much better than without them. There are some good apps that recommend certain ND filters depending on location, time of year and position of the sun/time. Lens flares in backlit shots are also largely suppressed, which Neewer also does well.

The lenses are easy to clean and a case is included for transport. I can only recommend. If you are looking for ND filters and do not need the polarization settings, you can also use Neewer. Neewer is occasionally on sale, unfortunately I don't know about K&F yet. Because they are new to me.

Excellent filters for the DJI Mavic 3 Classic. I had already bought and repurchased them for the Air 2S because they are necessary to take some good videos and photos. I recommend this brand for quality and price. In addition, with these two filters you cover the entire range of the full day package. The quality is there.

The ND filters for the DJI Mavic 3 Classic drone of excellent workmanship, very easy to install and use and with excellent packaging.
I use it with my drone and the difference is remarkable. It eliminates digital over-sharpening, reduces contrast and allows you to reduce shutter speed. good investment

This ND filter set is a must-have for your DJI MINI Series drone. They fit well and are easy to assemble. The kit comes with 6 filters. All metal, not cheap plastic. They do not affect the gimbal operation and allow beautiful pictures and videos. The last three images were taken with the ND 32, one facing the sunset, one facing the sun and one facing away from the sun, all taken in 2 hours on the same day!