About This

• Unmatched 98% Average Transmission! Freedom from ghost images (very low reflection multi-coating, Striae-free, and plane-parallel substrate).
• Extremely Sharp Cutoff at 680nm (leaves all the visible red, including the important 656nm H-alpha emission line).
• Sharp cutoff below 420nm. Eliminates violet halos around bright stars (more effectively than simpler so-called Minus Violet photographic filters).
• True optical quality glass substrate and coatings. Why spend all your money on quality primary optics - only to place a lower grade filter optic in the path
• Combine with any of the other Baader filters, to deliver the sharpest images possible.

Overview

• Brand : CELTICBIRD
• Material : Glass
• Photo Filter Thread Size : 1.25 Inches
• Coating Description : Multi Coating
• Photo Filter Effect Type : Ultraviolet
• Water Resistance Level : Not Water Resistant
• Product Dimensions : 1.25"L x 1.25"W
• Photo Filter Size : 31.75 Millimeters
• UPC : 730637251284