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 ...

The Celestron Astromaster 70AZ Newtonian reflector is an extremely popular budget telescope thanks to its ideal balance of features, size, and price.

Via astronomer Salman Hameed at Irtiqa, this encouraging item from the Express Tribune about a young student in Okara, Pakistan, who built his own Newtonian telescope from scratch. A childhood ...