ATT Volume 18 Issue 2

In this issue Matt Harmston shows how establishing back-focus can be an iterative process requiring repeated confirmation and/or refinement of other observing system characteristics; Paul Temple describes his experiences with a classic Celestron 6” achromatic refractor nicknamed “The Beast!”; Rafael Fiol discusses how he designed and printed a 3D Newtonian reflector telescope; Dr. James Dire shows how the Sky-Watcher USA Heritage Tabletop Dobsonian is one of the best telescopes for under $300; plus industry news, new products and more.