Astronomik H Alpha 12NM CCD Clip Filter Canon APSC 2458343 Bahtinov masks are adjustable to

Bahtinov masks are adjustable to fit a wide range of optical tubes

Lowest Useful Magnification: 21x

Combines with the (planeoptically polished) BAADER Infrared Cut-Filter

Magnification of Eyepiece : 48x

Celestron Labs S20 Stereo Microscope

Astronomik H Alpha 12NM CCD Clip Filter Canon APSC 2458343 Bahtinov masks are adjustable toHydrogen Alpha 12NM CCD Clip Filter for Canon APSC Sensor The Astronomik 12 nm H alpha CCD Clip Filter for Canon EOS APS C cameras is a narrow band pass filter for hydrogen nebulae and can be inserted into the camera body within seconds. Do you own a Canon EOS digital camera for astro imaging? Then you have surely encountered the following problems: Large filters for large camera lens objectives are very expensive. If you place a filter holder between