Everand Logo

Welcome to Everand!

  • BBC Sky at Night

    DIY ASTRONOMY

    Sep 17, 2020 3 minutes

    How to collimate a Newtonian telescope

    Discover how to optically align your Newtonian and avoid distorted views

    Newtonian reflector telescopes are perennially popular for amateurs for their relatively low cost for any given aperture and their naturally good colour correction. But due to the loose way in which a Newtonian’s two mirrors are typically held, this design of telescope can lose its optical alignment relatively easily, especially when compared with more robust telescope designs like refractors. The process

    You’re reading a preview, subscribe to read more.

    More from BBC Sky at Night

    BBC Sky at Night1 min read
    This Month's Contributors
    “Star parties are one of the best things about this hobby: a chance to meet fellow stargazers under dark skies. But oh, how they’ve changed!” Join Stuart for a look back at astronomy events of yesteryear, on page 34 “As a high-school student, I thoug
    BBC Sky at Night2 min read
    Scope Doctor
    Email your queries to scopedoctor@skyatnightmagazine.com How do I align my equatorial mount? FRASER DAVID You haven’t told us whether you have a polarscope installed in your mount. Assuming that you don’t, here’s how to achieve a basic polar alignmen
    BBC Sky at Night3 min read
    Deep-sky Tour
    Shortening nights mean this month’s tour is best seen at the start of May. We start with the iconic form of M104, the Sombrero Galaxy. This is a mag. +8.0 side-on peculiar galaxy with a prominent dust lane running south of its equatorial plane. Locat

    Related Books & Audiobooks