BORG 90FL Telescope Set CR (6390)

Telescope with ultimate optical resolution.
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Instructions Manual   PDF, 170 Kb

The 90FL model was the top rank, high-end BORG telescope until the 107FL model was released. The 90FL has exceptional optical resolution, accomplished by apochromat fluorite glass elements from Canon Optron, Inc. built in the optical design of the objective lens, and a super tele 500mm focal length and aperture of f/5.6. A great piece of gear for observing celestial bodies and wild birds.

The 90mm front element diameter does not hamper the 90FL's extreme compact and lightweight capabilities thanks to the detachable carbon fiber made barrel. Recommended for starry sky, nebula, star cluster, and planet observation. You can convert this telescope to a tele lens by swapping the prism and eyepiece with a BORG camera mount adapter (sold separately).

Highlight features

  • Objective lens equipped with apochromat fluorite glass elements from Canon Optron, Inc.

  • Objective lens optical design: 2 elements in 2 groups, fluorite, apochromat, fully multicoated.

  • Robust and beautiful carbon fiber barrel.

  • BORG 80Ø barrel system.

  • Rack & pinion focusing system.

  • Erect prism (included) allows users to observe both on-ground objects and celestial bodies.

  • 20mm and 9mm eyepieces included.

  • Lightweight construction of 3 kilograms (including accessories).

  • Arca-Swiss Quick Release System tripod plate.

  • Objective lenses and major parts are Made in Japan.

'CR' stands for carbon fiber barrel and rack & pinion focusing system.

Camera mount adapters and other camera components are sold separately.


Model Name BORG 90FL Telescope Set CR
Product Code 6390
Focal Length, mm 500
Aperture f/5.6
Min. Length, mm 420
Weight, g 2900
Filter Size, mm 82
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