My personal preferences for Newtonian collimation are both a Cheshire and a laser collimator. And if you’re collimating a 2″ focuser, I strongly recommend using a 2″ laser collimator. A 1¼ ...

With Newtonian designs, the two mirrors within the tube should be aligned and astronomers usually achieve this process — known as collimation — using thumbscrews to adjust the optical system.

Learn how to optimize a budget Newtonian telescope for astrophotography with collimation tips and more. Justice Department says Trump can abolish national monuments All Five John Wick Movies ...