Borg 125SD Apochromatic Refractor.

BORG 125SD Apochromatic Refractor.

New Refractor From Borg/Pentax.
For Visual Use and Imaging at F/5.1 and
F/3.9.
Compact and Highly Portable.
Astronomy Hot Product - See the review in the January 2009 issue of Astronomy Now.

The new Borg 125SD represents a collaboration between Borg and Pentax on a new objective lens design with the following specifications:

* Aperture 125mm (5")
* Focal Length 750mm (29.5") F/6.0
* SD Apochromatic Objective, fully multi-coated
* Tube Diameter 115mm (4.5")
* Physical Length 656mm (25.8")
* Weight 3.5kg (7.7lbs)
* Includes 360mm Main Tube (8630), Finder Base Tube (8751) and M68.6 Drawtube (8318)
* Short Tube Set (9125S) also available

Features:
* Newly redesigned, advanced lens elements allow dramatically improved optical performance
* Objective lens cell is produced by Borg's new partner - Pentax, Japan, which produces the
highest grade optics in the industry
* ED F/4 Reducer (7704) combines with the 125SD to create a fast optical system - F/3.9
astrograph (6 elements & 2 SD/ED elements in an advanced Petzval optical design), which
covers 35mm full format sensors
* 0.85x Field Flattener (7887) creates a 5 element Petzval system at F/5.1, which achieves a
virtually flat illumination across 35mm full format sensors
* 1.4x Teleconverter (7214) configures the system as a 1050mm F/8.4 imaging system
suitable for lunar, solar and planetary targets
* Borg's modular design allows for easy airline packing, without compromising optical quality
* Compatible with wide range of Borg adapters and accessories
* Lightest OTA weight in its class allows use of a small mount
* Focuser options - Borg Helical Focuser M (7835), Borg Helical Focuser MDX (7837), Any
Borg M57 focuser via adapters, Feather Touch Focuser FTF-8C and FTF-M57 (via FTF-BORG
adapter)
See our online library for the Borg 125SD System Diagram showing various Imaging and
Visual configurations.

Options:
Borg 125SD OTA Basic Set

Borg 125SD OTA Basic Set Short Tube Version

Borg 125SD F/3.9 Astrograph Set (9125S + 7835 + 7704)

Borg 125SD F/5.1 Astrograph Set (9125 + 7834 + 7887)

Astronomy Hot Product - See the review in the January 2009 issue of Astronomy Now.