Collimating a Newtonian telescope … some tips

Okay, I know that there are already loads of blog posts, web pages (including the excellent Astro baby site) and YouTube videos on this, but I felt that my recent experiences of the subject warranted adding one more. Background I’ve had the scope (a SkyWatcher 250PX dob) for about 8 or 9 years (bought secondhand), …

Collimating your Newtonian telescope – laser or collimation cap?

Note: my thoughts on collimation have changed since this post was written. I now only use a collimation cap, and prefer not to try to use two methods as I only end up chasing my tail trying to get them to agree. While the Baader laser worked well enough, I feel the collimation cap is …