Advantages1. The camera is small and can be carried easily.2. The battery usage time is long.3. Easy to select menu.4. It is waterproof.6. The price/performance is good.Disadvantages1. In 1080 60fps shooting, the pixels are coarse than expected, and the sharpness of the screen is poor. 2. The zoom function is meaningless because it is not an optical zoom. Conclusion: Good for beginners to use.(After using more, I will add a testimony.)

Great Variable ND Filter for the price

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.

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!

The K&F Concept ND filter set is compatible with the DJI Mavic 3 Classic. The set of 4 includes four ND filters (8, 16, 32 and 64). The workmanship is of high quality and the attachment is very quick. With the filter set you are actually equipped for almost all eventualities (regarding the influence of light and weather conditions). You can shoot great videos or take pictures that are much better in terms of quality, color and light play than without a filter.

I'm pretty impressed with these ND filters. First off, the build quality is pretty good...metal frame and glass construction, as opposed to the cheaper plastic versions (that I've had before). The picture quality is great in my opinion. Check out the short video for yourself. Shot on Mavic Mini (original) with ND32 filter 1080p at 30 fps and ISO 100. I also have another brand (Freewell) of ND filters for my Mavic Air 2 and I find that they work just as well as this one (obviously different drones... but compared to image quality) and are a bit cheaper. These install easily and stay on securely. I would definitely recommend these.

I recently bought a DJI Mavic 3 Classic, mainly for filming videos. The Mavic 3 is great because it has a physical aperture that lets you control the amount of light that comes in, but like any camera, it's limited. So in order to film at a cinematic frame rate with a shutter speed of 24fps and an exposure time of 1/50th of a second, I needed help, even on cloudy days. These ND filters do it and do it well.

The filters come in nice plastic packaging with solid foam cut outs for each filter which protect them well. The filters fit the camera just as securely as the clear glass filter that comes with the drone. But it may take a little fiddling to get it just right. And since the area of ​​the ND filter region is slightly larger than that of a clear filter, the additional filter area ensures that there is no vignetting (darkening at the edges) that can often occur with ND filters. Also, I didn't notice any color cast.

If I had to complain about anything, it would be the microscopic lettering that the filters are labeled with. This is partly due to the thin frame, so they don't have much to work with. But for old people like me, they could have used a slightly larger font. So keep a magnifying glass in your pocket if you want to know which filter to choose.

Otherwise, K&F generally makes high quality products, and it appears to do so. That's a good value.

The video example was shot on a mostly cloudy day at 24 frames per second, 1/50 second exposure time, 400 ISO, f/6.3 with the ND8 filter.

Here you get a practical ND filter set for the DJI Mavic 3 Classic.

The optical properties of the filters seem to be very good and that at a reasonable price.

The filters fit easily on the camera of the DJI Mavic. I have had good results with these filters.