William Optics Red Cat61 - 61mm f/4.9 Petzval Refractor - T-C-61RD 60 mm Refractors This 25 mm eyepiece is

This 25 mm eyepiece is a convenient focal length for observing many celestial objects including the Moon and planets

Bahtinov Cap

mechanical and ergonomic improvements throughout make the mount sturdier

XX Illuminated Glass Reticle

M48 threads (not standard T-thread)

William Optics Red Cat61 - 61mm f/4.9 Petzval Refractor - T-C-61RD 60 mm Refractors This 25 mm eyepiece isThe William Optics RedCat 61 f 4. 9 Petzval Refractor is a fast, portable quad refractor perfect for astrophotography. Its four elements are arranged in three groups, with FPL 53 glass used in the first group of two, followed by a single central element and a single rear lens that acts as a flattener. This quad optical system produces beautifully flat, high contrast images that are virtually free of chromatic aberration. The RedCat 61 Petzval