GSO 2" mirror star diagonal are of extreme goodt mechanical and optical quality at a low price. The body is an all metal (aluminum) construction. A star diagonal mirror to be used with standard 2" focusers on any telescope with sufficient focus travel, like most Refractors and Maksutov-Cassegrains. The 2" barrel with 48mm thread, it is convenient to fits with most brand 2" filter.
GSO's 2" Refractor Mirror Star Diagonal is an excellent alternative to higher priced diagonals for those on a budget or just getting started in the 2" format. This diagonal features Al + SiO2 coatings with 92% reflectivity across the visible spectrum and a 1/10 wave mirror. This GSO diagonal offers excellent mechanical and optical quality at a great price.