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Universal Binocular Mount Far-Sight System
It must be removed completely to insert or remove the telescope
Standard — no wheels
The filter cell threads onto a Schmidt-Cassegrain Telescope rear-cell
It absorbs light instead of bouncing it
Lumicon 1.25" Minus Violet Filter – Reduces Chromatic Aberration DSLR Bahtinov Masks Universal Binocular Mount Far-Sight SystemThe Lumicon 1. 25" Minus Violet Filter blocks violet and ultraviolet light shorter than approximately 420nm to help bracket the color corrected band of refracting telescopes. It reduces blue halos around bright objects and minimizes chromatic aberration in photographs. It is also useful as a visible light filter in RGB astrophotography with reflecting telescopes. Key Features Cuts off wavelengths below ~420nm Reduces purple fringing and blue halos
