The STARTRC Lens ND Filter Set (ND16, 64, 256) is specially designed for the DJI Mini 4 Pro drone and reduces the amount of light, allowing the camera to select the correct exposure value. It has excellent hand-grinding technology and good physical and chemical properties. The use of high-end materials, and excellent quality, can effectively protect for DJI Mini 4 Pro camera, and can excellently complete the shooting under harsh conditions, ensuring your epic content with perfection. The STARTRC filter set is made of imported AGC high-definition optical glass and the optics ensure color neutrality, ensuring you get epic content with perfection. The DJI Mini 4 Pro ND filter set allows longer exposures to capture the beauty of time and motion. It has a lightweight design for aircraft aluminum, ensuring stable use for a long time flight. This will not affect the gimbal calibration.