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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.

Aligning an equatorial mount on Polaris

DIY: Astronomy Projects & Guidance

Accurate Polar Alignment with Your Telescope

Long-exposure astrophotography requires an accurately aligned equatorial mount.

blueprint

DIY: Astronomy Projects & Guidance

8 Backyard Observatory Mistakes to Avoid

Here are a few potential problems that you might not see on your blueprints.

outstanding collimation aid

DIY: Astronomy Projects & Guidance

Collimation Tools

Three tools are commonly used to collimate Newtonian reflectors.