Astronomic’s Astro-Tech 152EDT f/8 triplet apo refractor ($3999US) features a massive 3-inch rack-and-pinion focuser with a built-in camera-angle adjuster. The triplet objective includes a low-dispersion FK-61 ED element, as well as a Lanthanum element. The Astro-Tech 152EDT OTA (with rings and both dovetails) weighs 29 pounds (13.1 kilograms). The focus […]