William Optics Red Cat61 - 61mm f/4.9 Petzval Refractor - T-C-61RD 60 mm Refractors M48 threads (not standard T-thread)

M48 threads (not standard T-thread)

6 mm Field Stop Diameter: 17

Bahtinov Cap

XX Illuminated Glass Reticle

Since the TeleVue Delos Eyepiece eye-lens measures a quite large 35mm in diameter

William Optics Red Cat61 - 61mm f/4.9 Petzval Refractor - T-C-61RD 60 mm Refractors M48 threads (not standard T-thread)The 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