Aviation aluminium alloy frame, ultra-thin and ultra-light, wide-angle telephoto end shooting without vignetting, the frame is processed by CNC technology, with jagged edge design, the product is very comfortable in anti-slip and feel,better rotation. Imported optical glass, ultra-high-definition double-throwing waterproof and scratch-resistant, reduces lens flare, and removes ghosting The filter frame uses self-locking technology. When rotating to the Min end or ND32, the frame is automatically locked, which is convenient for dimming positioning and avoiding the phenomenon of the black cross. Multi-layer nano-coating, effectively reducing the light reflection on the filter surface, Variable light reduction eliminates washed-out images and allows long exposure and motion blur techniques in variable light improving image quality. Adjust the reduction gear, ideal for a long exposure. The waterproof, scratch-resistant and transparent green film, effectively blocking oil stains, fingerprints, scratches and scratches, etc. Features: Reduces the amount of light reaching the film without affecting the colour. Applies slow shutter speed under strong sunlight exposure. Glass mounted with high-pressure press technology. Made of high-quality optical glass by K&F Concept technology. Extinction paint Seiko manufacturing, To achieve the testing sights on the military standard. ND Filter Function: Neutral density can be adjusted from ND2 to ND32, Reduces the amount of light reaching the film without affecting the colour. Have Control of Any Lighting Environment. Allows wider apertures, effectively decreasing depth of field. Suitable for dynamic screen, waterfalls, streams, waves, etc.