Celestron Light Pollution Imaging Filter - RASA 11 (93617) uv Mirror material made of glass-ceramic

Mirror material made of glass-ceramic with 1/10 lambda surface accuracy

OIII-CCD and SII-CCD

The filter works as a monochromator: suppressing the effects of the atmospheric turbulence and delivering images that are significantly sharper

the beam splitter inside of the binoviewer can be very close to the front of the housing

giving you crisp

Celestron Light Pollution Imaging Filter - RASA 11 (93617) uv Mirror material made of glass-ceramicGet the most out of your Celestron Rowe Ackermann Schmidt Astrograph 11, even under light polluted skies, with this Light Pollution Imaging Filter, custom designed for the RASA. No matter which camera you use, this filters generous 68 mm clear aperture allows it to easily accommodate todays largest sensors. Utilizing a machined aluminum housing and Schott B270 glass, the filter replaces the RASAs clear optical window so the RASAs optical performance