Collimate Newtonian Reflector

DIY: Astronomy Projects & Guidance

How to Align Your Newtonian Reflector Telescope

Accurate optical alignment is neither difficult, mysterious, nor time-consuming. In fact, it's only three steps away.

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DIY: Astronomy Projects & Guidance

Offsetting Your Secondary Mirror

The secondary-mirror offset is no doubt the most misunderstood aspect of collimation. Luckily you don't need to understand it to collimate your instrument.

outstanding collimation aid

Stargazing Basics

Collimation Tools

Three tools are commonly used to collimate Newtonian reflectors.