Astrograph

Collimating a Newtonian Telescope

Collimating a Newtonian Telescope

Collimating a Newtonian telescope is something every backyard astronomer should experience.  In this post, I align my 8″ Orion Astrograph Newtonian for a night of astrophotography in the backyard. My deep-sky target is M101 – The Pinwheel Galaxy – in the constellation Ura Major.  With a proper alignment of the mirrors in this reflector, I…