SmallRig Attachable VND Filter Kit ND2-ND32 (1-5 Stop) with M-mount Filter Adapter 52mm 4386 is a VND filter kit, including a filter and a M-mount magnetic adapter. The VND consists two CPLs, stacking and rotating to reduce the amount of light, thereby balancing the exposure time. Its inner polariser magnetically mounts to the SmallRig filter adapter ring via a bottom locating ring, whereas the outer polariser can be rotated via an aluminium alloy ring at 1-5 stop variations to reduce the amount of light.Made of German Schott B270i HD glass, the filter features waterproof, stain-resistant, mildewproof, and scratch-resistant AR coatings, with less colour cast, as well as a CNC-machined ultra-thin frame. Large-diameter filter prevents vignetting even in shooting using an ultra-wide angle lens. It can be magnetically and securely attached to SmallRig magnetic filter ring adapter via the bottom anti-deflection design and rotated between a range of hard stops at ND2 & ND32 for precise contr