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Ships within 48 hours · Estimated delivery Aug 5 - Aug 10
6 mm Field Stop Diameter: 17
Bahtinov Cap
F Ratio: F7
This 25 mm eyepiece is a convenient focal length for observing many celestial objects including the Moon and planets
William Optics Red Cat61 - 61mm f/4.9 Petzval Refractor - T-C-61RD 60 mm Refractors 6 mm Field Stop Diameter: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
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