By Dr. James R. Dire In 2017, I picked up two new William Optics telescopes: a Twentieth Anniversary Edition Fluorostar 132 (132-mm f/7 triplet Apo) and a William Optics Zenithstar 61. In a previous article, I reviewed the Fluorostar 132. Here, I will review the William Optics Zenithstar 61. The […]
The heart of William Optics’ Super ZenithStar 103 f/6.9 imaging APO is a f/6.9 air-spaced FPL53 doublet housed in a CNC-machined ultra-precision lens cell. Add a 0.8x flattener/reducer, and the focal ratio becomes f/5.5. Focus duties are performed by the Zenithstar 103 ultra-robust 2.5-inch, 1:10 dual-speed, rack-and-pinion focuser with […]
Custom Telescope Cases from Image Alloy Cases Beginning in the mid-to-late 2000s, Celestron supplied its 8-inch SCTs without a case, which was surprising considering that Celestron’s signature scope was marketed as a portable telescope. Indeed, the C8’s impressive portability-to-aperture factor was why I bought it. After exhausting other ideas, I […]