Details:
- Category: Cameras & Optics
- Secondary: Optics
Description:
Best Quality Guranteed. 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.