dfas OPTOLONG 82mm Diameter Clear Sky Filter Light Pollution

Thebest OPTOLONG 82mm Diameter Clear Sky Filter Light Pollution_x000D_ _x000D_ Tersedia di toko Lucklot_x000D_ _x000D_ Specifications:Brand OPTOLONG Item Clear Sky FilterSize 82mmSuitable for Use under 3-5 light hazardsPlastic box material PP materialBox lining material High pressure white EVA materialApplicable Target:- Wide angle shooting of starry skies in all seasons in an environment with slight light pollution;- The camera is capable of shooting city night scenes in light-polluted environments.Manufacturing Process:- High-precision double-sided polishing - ensuring substrate parallelism better than 30 #39; and face shape better than λ/4.- Ultrasonic cleaning of pure water - using 13 tank cleaning process, effectively remove impurities and dust from the substrate surface.- Ion source-assisted coating - optimizes film density, firmness and uniformity, effectively reducing temperature drift.- Rigorous quality control - each filter is photometrically spectroscopically verified and laser interferometer type-checked.Package included:1 * OPTOLONG 82mm Clear Sky_x000D_ _x000D_