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.