BOTH VND AND CPL Aluminum Alloy Material CNC Integration ProcessExquisite CraftsmanshipOutstanding Texture K95 Optical Glass Multicoating & Resistance Coating Full-frame Coverage Compatible with variety of lenses, maximum 16mm focal length. Easy to cope with wide angle lenses. No Color Cast Design Characteristics of VND-CPL Filter Dual Specification 0.3-1.5 stop | 0.9-2.1 stopThe dual specification is designed for professional-grade fIlm and television needs, distinguishing the calibration of the photo version. Solve the problem of physical cross dark angle caused by the large span of ND. Strictly corresponds to the fixed ND calibr ation. -2 in 1, Both VND and CPL -Aluminum alloy material,CNC integration process -K95 optical glass, multicoating&resistance coating -Full-frame coverage, compatible cith variety of lenses, maximum 16mm focal length. Easy to cope with wide angle lenses -No color cast design,film-grade scale,more intuitive and clearer -Lockable ND design,polarization can be adjusted with ND locked Specifications: Package Contents:VND-CPL 77mm / 0.3-1.5 (535820) VND-CPL 77mm / 0.9-2.1 (535821)VND-CPL 82mm / 0.3-1.5 (535822)VND-CPL 82mm / 0.3-1.5 (535823)