H-alpha H-beta OIII (Hα-Hβ-OIII) Imaging Filter for the 8” RASA GoTo saying things like

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high precision 12mm thick mirror substrate flat for optimal image stability

Maintains a more neutral color balance than other light pollution imaging filters

Two of the legs come with padded wraps

and Evolution computerized telescopes

H-alpha H-beta OIII (Hα-Hβ-OIII) Imaging Filter for the 8” RASA GoTo saying things likeEnhance imaging of nebulae with your 8 Rowe Ackermann Schmidt Astrograph (RASA) by blocking light pollution, improving image contrast, and darkening the sky background. This filter transmits only the key H H OIII wavelengths from emission nebulae, providing high contrast that makes them pop. This filter selectively blocks wavelengths of light from sources of light polluted skies and natural sky glow. Unlike similar filters with narrower bandpasses,