Opened, but never used. Specifications Filter Type: Circular Polarizing Filter + Variable Neutral Density Filter Density: ND2-32 (1-5 stops) Frame Depth: 0.3" / 7.6mm (excluding thread height) Material: Optical Glass, Aluminum Alloy Photo Filter Effect Type: Polarizer, Neutral Density Water Resistance Level: Water Resistant Package Contents 1 x 2in1 ND&CPL Filter 1 x Protective Case 1 x Cleaning Cloth Product Description 【Variable ND & CPL Filter】By adjusting the ND filter and rotating the frame, you can simultaneously achieve the functions of both ND and CPL filters. This 2-in-1 filter kit allows you to shoot in bright lighting conditions and capture motion blur images. It reduces reflections and glare from shiny objects like water and glass. Reduces light by 1-5 stops with the variable neutral density filter. 【No Dark Cross Shadow】To solve the well-known vignetting problem often encountered when using variable ND filters with wide-angle lenses, the NEEWER filter set uses self-locking technology to ensure no dark cross shadows or vignetting when shooting with wide-angle lenses. 【HD Optical Glass with Multi-Layer Resistant Coating】High-quality HD optical glass and 30 layers of nano-coating on both sides of the filter reduce reflection to less than 0.1%, reducing flare and ghosting. Protects the filter from water, oil, dust, and scratches. 【Aircraft-Grade Aluminum Alloy Frame】Made of CNC-machined aluminum alloy, the non-slip texture of the frame makes it easy to install and remove the filter. Laser-etched markings allow for precise control from the minimum (ND2) to the maximum (ND32) light reduction. This filter has an ultra-thin design, with the front diameter larger than the rear diameter. https://neewer.jp/products/neewer-2-in-1-variable-nd-filter-nd2-nd32-cpl-filter-66601418?_pos=2&_sid=92e86519e&_ss=r