Product Name: Dark Circular Polarizer Neutral Density (CPL-ND) Camera Filter -ND1000 Coating: HMC Customized: Customized Certification: RoHS, CE Lenses Color: Black Material: Optical Glass Shape: Single-lens Transmittance: 0.07%-0.12% Type: Flat Lens Usage: Optical, Photography Trademark: MECO&OEM Transport Package: Regular Specification: 100mm* 105mm, 150mm*150mm, 180mm*180mm Origin: China HS Code: 9002201000 Product Description Glass:Schott Glass 1.0mmGlass thickness:1.0mmFilter Ring style:RotationFilter Ring Thickness:7.3mmScrewon Thickness:5.3mmCoating:15 layers with water proof coatingSize:37MM/39MM/40.5MM/46MM/49MM/52MM/55MM/58MM/62MM/67MM/72MM/77MM/82MM/86MM/95MM/105MM/150 100*105/150*150/180*180 Dark CPL: A polarizer combined with a solid neutral density filter, designed for wide-angle shootingLooking at the upcoming new filters, what is a dark CPL? If you've shot with a polarizer and separate ND filter on a wide-angle lens before, you'll likely have experienced vignetting, especially when shooting wider than 20mm. The new Dark CPL is designed to combine polarization and neutral density in one individual filter and allow you to capture images without vignetting at focal lengths as wide as 16mm. More specifically, the Dark CPL is a combination of our cpl and Neutral Density filters in one piece.