Top Features German SCHOTT Optical Glass . Waterproof Oil and; Scratch resistant coating . Multiple grinding for high-definition image . Quick release design . Extremely light and; robust It prevents overexposure and saturates colors which is especially useful when capturing water mists or nighttime light trails. VideosFIt reduces the shutter speed to create smooth cinematic aerial videos. Extremely light yet robust without influencing drone performance. CNC Aviation aluminium frame makes the filter extremely light yet robust. It is corrosion proof and carefully engineered to not affect your drone’s balance. German SCHOTT optical glass for high-definition images. The filter uses German SCHOTT glass as its base material which has been ground and polished multiple times to create a low refractive index for color accurate photo capture. Double-sided coating making it water oil and scratch resistant. The filter\'s double-sided multi-layered coating repels water and oil which makes it easy to keep clean. The filter\'s hard coating also makes it scratch resistant. Specification Material Aluminium Optical Glass . Weight 1.8g per filter . Dimensions 2.9 x 2.35 x 0.41mm