Celestron Ha-Hb-OIII Imaging Filter - Rowe-Ackermann 8 Astrograph - 93619 Binocular Viewers diffraction-limited optical systems are multi-coated

diffraction-limited optical systems are multi-coated to maximize contrast and image sharpness

·Quick and easy no-tool setup

Secondary Mirror Obstruction: 3

Use the lighter filters with smaller telescopes and higher magnification eyepieces

and galaxies (like the Andromeda Galaxy)

Celestron Ha-Hb-OIII Imaging Filter - Rowe-Ackermann 8 Astrograph - 93619 Binocular Viewers diffraction-limited optical systems are multi-coatedCelestron Ha Hb OIII Imaging Filter Rowe Ackermann 8 Astrograph This is a Celestron Ha Hb OIII Imaging Filter for the Rowe Ackermann 8 (RASA) Astrograph Enhance imaging of nebulae with your 8 Rowe Ackermann Schmidt Astrograph 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 yields better images This filter