ND Lens Filter for Hero 9 Sports Camera Camera Filter Set Waterproof HD Sports Camera Accessories Feature: 1. ND filter reduces incoming light without affecting color, allowing greater control over aperture, exposure time and sensor sensitivity settings. 2. The CPL filter can eliminate non-metallic reflections and restore the true colors of the subject. 3. Optical glass has good light transmission and can record high definition video while producing depth of field or getting sharper photos. 4. It is waterproof, oil and scratch resistant, reducing fingerprint fog, providing low refractive index and excellent color neutralization. 5. Easy to carry. Take out and install it can be used, it is no doubt quick and labor-saving. 6. Made of high quality aluminum alloy, which is durable, sturdy and lightweight. Specification: Item Type: Sports Camera Filter Set Weight: Approx.15g / 0.5oz Material: Aluminum Alloy Applicable Model: Suitable for Hero 9 Sports Camera Package List: 1 x ND Filter