CUT 18.66 F-STOPS Urth Variable ND2-400 Lens Filter is made for shallow depth of field, long exposure and motion blur techniques in changing light. Great for nature and landscape photography. LOCKING RIM Our Variable ND Filters have min-max locking mechanisms to prevent over rotation and the X-effect. SUPERIOR GLASS This Variable ND Filter features 8-layer nano-coated Japanese AGC glass, ensuring exceptional light control and transmission. PRECISION ENGINEERING The ultra-slim rim design of this neutral density filter optimizes optics and prevents vignetting. LIFETIME QUALITY Made from tough magnalium, the Urth ND2-400 Filter offers lasting resilience. Backed for life.