Borg - Series-60 45ED II Refractor Telescope - Discontinued

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Borg - Series-60 45ED II Refractor Telescope - Discontinued   Discontinued
Item # BG-6045
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  • Extra-low dispersion glass and 45mm of upgradeable aperture.
  • The Borg Series-60 45EDII Refractor can act as a finder, guider, spotting scope, travel scope, telephoto lens and more!
  • Disassembles for easy storage or transportation.


Borg Refractors - Series-60 45EDII f/7.2 Refractor

Portability is an important factor in the Borg system design philosophy. Scope tube diameters are no larger than absolutely required for the light cone, reducing tube weight (but without going to the point of sacrificing stiffness). Lighter scopes themselves make travel easier, but more significantly, they also translate to fewer counterweights and less flexure problems.

Borg telescope tubes can also be disassembled down to short pieces, a convenience for packing, especially for airline trips. Optics, including the objective lenses, can be removed so that only the critical components need be hand-carried. Removable optics have also proven to be a benefit in humid climates where optical components need to be stored in climate-controlled boxes to prevent mildew damage.

Modular design is a strong point of the Borg refractor systems. This allows the use of many Borg components across several families of telescope sizes, thus reducing production costs and selling price to the user. This also means more system flexibility to the user.

Upgradability of the Borg refractor telescope was another goal achieved by modularization. A Borg system can start small and be upgraded incrementally as needs change. Even objectives can be upgraded with minimal impact on the rest of the system.

Photo-visual design with no compromises was a primary concern of the system designer at Borg telescopes, an accomplished photographer with decades of experience. Borg refractor scopes fully cover the 6x7 cm frame of the popular medium format Pentax 67 series cameras, and include photographer's extras such as a precise, indexed, lockable (two lockscrews) helical focuser and a full range of field flatteners and teleconverters. Also available are a full line of 35mm camera accessories and visual adapters.

When it comes to adding extras, wide accessory selection is another distinguishing feature of the Borg refractor line. Adapters for virtually all popular accessories (1-1/4", 2", SCT, many 35mm and medium format cameras) are available.

Borg Refractors - Series-60 45EDII Refractor Features

  • Quality 1.8" (45mm) Objective lens crafted from ED glass.
  • Focal length of 325mm (f/7.2) and maximum diameter of 2.1 " (54mm).
  • Lightweight design is under one pound (380g).
  • Offers a generous 151 - 196mm of Back Focus.
  • Fully threaded for filters at 2.05" (52mm).
Borg Product Number: 6045

Note: Series-60 scopes may be mounted directly with a 1/4"-20 threaded screw into the standard mounting block, or in an available finder bracket. the mounting block is removable for Series-60 use with a finder bracket. Two M4/P0.7 metric screws, each spaced 12mm from the center hole, attach the mounting block to the OTA body.
Additional Information

Additional Information

SKU BG-6045
Manufacturer Borg
Telescope Series Borg Mini II
Optical Design Refractor - Apochromatic
Mount Type None - Optical Tube Only
Warranty Not Supplied By Manufacturer
Telescope Aperture 1.77"
Telescope Focal Length 325mm
Optical Coatings Fully Coated
Optical Tube Outer Diameter 54mm
Optical Tube Weight 0.83 lbs.
Tube Color or Finish Gloss White
Limiting Stellar Magnitude 11.3
Dew Shield Included? No, Not Necessary
Diagonal Included? No - Sold Separately
Eyepiece(s) Included None
Finder Included None
Included Items

Included Items

  • Borg Series-60 45EDII Refractor
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