SVBONY 25nm Filter Eyepiece Filter for Horsehead and Dark Cocoon Nebula H-Beta - 1.25" Nebula/California

Use the SV132 H-Beta eyepiece filter to observe the Horsehead Nebula, California Nebula, and Cocoon Nebula even in dark skies, suitable for medium and large aperture telescopes Due to optical high-precision double-sided polishing, the filter has 1/4 wave plate and parallelism on both sides.