Designed specifically for their 8 Rowe-Ackerman Schmidt Astrograph (RASA) telescope Celestron's Narrowband H-alpha / H-beta / O III Imaging Filter blocks all but three wavelengths of light to improve your shots of wispy nebulae like the NGC 7000 North...
Designed specifically for their 8 Rowe-Ackerman Schmidt Astrograph (RASA) telescope Celestron's Narrowband H-alpha / H-beta / O III Imaging Filter blocks all but three wavelengths of light to improve your shots of wispy nebulae like the NGC 7000 North...