How To Make a Large Telescope
An interesting overview of the engineering behind some of the world’s largest telescopes, by Phillip Young.
IR Pass Filters – An Appraisal by Lee Phillips
What are infrared filters, and how they work.
David Trelfer’s Widefield Camera Rig
A short article on Dave’s custom widefield imaging setup.
The Telrad – A Video Introduction
A quick introduction to that lovely black box, the Telrad.