All new, a unique, RotoLock high-quality fully multi coated WO 50mm f/4 Guiding scope that fits perfectly on your William Optics and other telescopes.

The tube diameter is 54mm and dew shield of 58mm.

Focal Length：200mm

Features

Convenient

• Guiding scope gives sharpest image and straight through viewing with an inverted image.
• High-quality 50 mm objective.
• 5.7 deg field of view.

Nice Fit & Finish

• White Powder painted with 1.25" red colour RotoLock.
• Perfectly suited for William Optics or other refractor.
• Guide Scope Length: 241mm
• Guide Scope Weight: 455g