Borg 55FL f/3.6 Astrograph Set with Helical Focuser

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:	Special shipped 15-20 working days

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Frequently bought with this product:

Borg Series 60 Mounting Ring (x1)  + £75.00

About this product

Japanese made Borg 55FL f/3.6 astrograph features a premium quality Fluorite objective from Canon.

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: 55mm
• Focal length: 200mm
• F-ratio: 3.6
• Lens configuration: 6 elements in 5 groups, 1 fluorite
• Coating: Fully multi-coated
• Image Circle: 43mm
• Physical length: 190mm
• Tube diameter: 60mm
• Weight: 0.8kg
• Filter: 58mm (front hood) & 52mm on optional part (7000).
• Parts included: 2555, 7761, 7603, 7352, 7880, 7065 & 8992
• Notes: Includes Camera rotator (7352) and mounting bracket (8992).

55mm Flourite Objective

• Focal length: 250mm (fluorite)
• F-ratio f/4.5
• Length: 95mm
• Weight: 205g
• Interface (rear): M57/P0.75
• Interface (front): 58mm filter thread in front of hood

Precision helical focuser

• Length: 27 to 44mm light path
• Weight: 98g
• OD: 73mm
• ID: 49mm

0.8x Reducer

• Four-element reducer
• Back focus distance: 60mm
• Objective side interface: M57 P0.75 male
• Camera side interface: M57 P0.75 female

System Diagram

Items in the red box are optional and available separately.

Telescope Field of View Simulator

What's in the box

• 2555 - 55FL Flourite Objective
• 7761 - M57 Helical Focuser DXII
• 7603 - M57/60 M 40mm Extension
• 7352 - M57 Rotating Ring DX
• 7880 - 0.8x Quadruplet Reducer
• 7065 - Series 60 Mounting Ring
• 8992 - Arca Swiss Mounting Block

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