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

DIY: Astronomy Projects & Guidance

Collimation Tools

Three tools are commonly used to collimate Newtonian reflectors.