Ideal for photographing landscapes and nature. ND2-400 filter is often used for video. K&F Concept offers this Superior Edition range for professional photographers. Variable density filter reduces brightness by 1-8.66 diaphragms. ND filter enlarges the aperture for reduced depth of field. It allows you to practice a longer exposure time, and the creation of directional blur in low light. Made of premium Japanese optical glass, with a 28-layer nano-coating that balances colors, reduces unwanted reflections and protects the lens from water and scratches. Both sides of neutral density filter glass are used polishing technology to balance the light penetration path and ensure image quality. The aircraft aluminum frame is slim (thickness 7.6mm) to avoid dark corners or vignetting when in 16mm wide angle position. There are many landmarks and also a small handle system to adjust the indicative values.