Japanese made Borg 90FL f/4 astrograph features a premium quality Fluorite objective from Canon with 80mm tube diameter.

Includes a Starlight Instruments Feather Touch 2" dual speed focuser with 2" of draw tube travel and a compression ring.

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

Specification

• Aperture: 90mm
• Focal length: 360mm
• F-ratio: 4
• Lens configuration: 6 elements in 5 groups
• Coating: Fully multi-coated
• Physical length: 400mm
• Tube diameter: 80mm
• Weight: 1.9kg
• Filter: 82mm (front cap) & 48mm in front of reducer
• Parts included: 2591, 7151, FTF-BORGII, FTF-M57, 7872, 7352 & 2 x 7085
• Notes: Includes a pair of mounting rings.

90mm Fluorite Objective

• Focal length : 500mm
• F-ratio : 5.6
• Weight : 950g
• Length : 145mm

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 90FL f/4 Astrograph with Feather Touch Focuser Set Questions & Answers

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