The ND filter set for the DJI Mini 3 Classic was well packaged and delivered quickly. All filters are delivered directly in a handy plastic box. The package includes 4 ND filters with integrated pole filters. With the ND filters, you can shoot much nicer videos, especially on cloudless days. These are like sunglasses for the camera; the higher the value, the darker the image. When filming at 4K 30fps, the shutter speed should be 1/60 to make the footage look cinematic. However, this is impossible on sunny days, even if the ISO is 100. So it requires an ND filter to darken the image. If you want to shoot at 60fps, you should set the shutter speed to 1/120. This requires an ND filter with a small value. So far I've only used the ND4 to ND16 filter. The other filters are only suitable for special applications or for long exposures. Although the latter is difficult to achieve with a drone.
I am also satisfied with the processing quality of the filters. They are made of aluminum and glass and are very lightweight. The filters therefore do not impair the functionality of the gimbal system. The protective cover still fits the gimbal system. The filters can also be attached and removed without any problems. They also sit very firmly on the camera. In the end, you get inexpensive ND filters here, which help you to expose the video with the ideal exposure time.