Light Pollution Imaging Filter, 11" RASA 82° FOV First of all

First of all

Having an adjustable alignment system is an admission that the diagonal can go out of collimation due to poor mechanical construction

from 390-800 nm

to reduce diffraction spikes and light loss

Light Pollution Imaging Filter, 11" RASA 82° FOV First of allTake beautiful images of deep sky objects from light polluted suburban locations with the Rowe Ackermann Schmidt Astrograph (RASA) using this all new light pollution suppression filter designed by Celestron and Astrodon, the leading astroimaging filter company Custom fit to drop into RASAs optical window, so you get optimum optical performance even with the addition of the filter Selectively removes unwanted light pollution while allowing more overall