B+W PolHigh Transmisson Cirkular Master 40.5 mm Polarizing Filter

Features: - In These High-End Polarising Filters, The Polarising Foil Is More Tightly Specified And The Foil Pieces Are Specially Selected. - After Cementing Between High-Quality Cover Glasses, An Additional Grinding And Polishing Process Takes Place. - This Ensures Superior Sharpness Even With Very Fast, Apochromatic Lenses. The Cementing Technique Ensures Long-Term Stability Even In Humid Climates. - The Generation Of Käsemann High Transmission (Htc) Polarising Filters Is Designed With A Polarising Film That Has A Higher Light Transmission And Still Has An Excellent Efficiency. - The Filter Extension Factor Is Only 2 - 3 Which Corresponds To Approx. 1 - 1.5 F-Stops. Specifications: - Multi Coated: Yes - Polarizing Filter: Yes - Diameter (Mm): 40,5