Japanese made Borg 71FL f/4 astrograph features a premium quality Fluorite objective from Canon with 80mm tube diameter.

Includes a Borg Helical focuser for precise dependable focusing. 

Modular Borg design allows you to reconfigure the scope for visual observing or to disassemble it for ultra portability.

Specification

• Aperture: 71mm
• Focal length: 280mm
• F-ratio: 4
• Lens configuration: 6 elements in 5 groups
• Coating: Fully multi-coated
• Physical length: 330mm
• Tube diameter: 80mm
• Weight: 1.2kg
• Filter: 72mm (front cap) & 48mm in front of reducer
• Parts included: 2572, 7151, 7801, 7835, 7872 & 7352

71mm Flourite Objective

• Focal length: 400mm
• F-ratio: 5.6
• Weight: 410g
• Length: 170mm

Precision helical focuser

• Light path: 63mm to 82mm
• OD: 77mm
• ID: 56mm
• Weight: 320g

0.72x Reducer

• Four-element reducer
• Back focus distance: 60mm
• Image coverage: Full frame
• Objective side interface: M57 male
• Camera side interface: M57 female

Telescope Field of View Simulator

There are currently no specifications available for this product.

Borg 71FL f/4 Astrograph OTA Set Questions & Answers

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