A precision secondary mirror spider designed for DIY 6″ Newtonian telescopes with inner tube diameters from 164 mm to 180 mm. Built by GSO, this metal spider features thin vanes that minimise diffraction and obstruction, helping to maximise contrast for visual observing and astrophotography. Easy to install using M5 mounting threads and nuts, it offers stable support for your secondary mirror and improved optical performance in custom Newtonian builds.
Manufacturers & Suppliers of Astronomical Telescopes Since 1976