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Borg - An Introduction

Borg is a range of Japanese made high quality modular telscopes and astrographs that are designed for full format astrophotography and great portability.

Most of the Borg instruments can be supplied and configured to cover full format 35mm sensors at super fast focal ratios as fast as F3.9.

They are perfect for wide field astro photography and the modular nature of their design enables the telescopes to be easily broken down into individual components for transport.

Borg telescopes are also very light weight and make an excellent choice for airline friendly high quality astro photography.

IanKingImaging only supplies the complete astrograph systems featured on our website.

£2,280.00

Borg 89ED f4.3 Set B08943 with FeatherTouch Focuser

This version of the Borg B08943 set substitutes the Borg helical focuser for the highly regarded Starlight Instruments Feather Touch 2" Dual-Speed Crayford.

The Japanese-made Borg 89ED f4.3 astrograph features an ED glass element and Borg's 4-element 0.65x ED Super Reducer for excellent results across a full-frame 35mm sensor.

Total six elements, including two Japanese Ohara ED elements.

Fully optimised for astrophotography.

The 0.65x ED Super Reducer Set includes a built-in filter holder as well as a camera rotator for flexible image composition. Provision for the attachment of filters is via a 55mm diameter filter thread on the front reducer lens assembly (for semi-permanent filter installation) and an easily removed filter holder which accommodates 52mm or 48mm filters. A camera shutter cable can be attached to the focal reducer assembly to make removal of the filter holder a simple operation which does not disturb the optical train. Additional filter holders (#7518) are available for quick changes between filters.

FEATURES
Made in Japan
89mm ED doublet objective
0.65x ED Super Reducer (#7704)
383mm effective focal length
Fast F4.3 focal-ratio
35mm full-frame coverage
Built-in camera rotator
Built-in filter holder

Includes

89ED Objective Assembly (#6188)

89ED Objective Assembly (white) (#2588)

2" Eyepiece Holder L (#7509)

2" Eyepiece Holder S (#7508)

M57 to T Adapter (#7522)

80mm Dia. 205mm Tube (#7800)

Draw Tube Holder & Drawtube (#7749)

SLR Camera Mount Adapter (#7000)

Tube 150mm long (#7150)

Drawtube (#7137)

0.65x ED Super Reducer Set (#7704)

Feather Touch Adapter 2.0" for Borg M57 (A20-229)

Feather Touch Rotatable 2.0" Diameter Dual Speed
0.8" Draw Tube Travel, Brake, 57mm Accessory Thread (FTF2008B-M57)

2 x M57 to M57 ADIII (#7459)

£1,844.00

Borg 89ED f4.7 Set B08947 with FeatherTouch Focuser

This version of the Borg B08947 set substitutes the Borg helical focuser for the highly regarded Starlight Instruments Feather Touch 2" Dual-Speed Crayford.

The Japanese-made Borg 89ED f4.7 astrograph features an ED glass element and the Borg 0.7x Triplet Multi Super Reducer with built-in camera rotator for excellent results across a full-frame 35mm sensor.

Total five elements, including one Japanese Ohara ED element.

Fully optimised for astrophotography.

Includes

89ED Objective Assembly (#6188)

89ED Objective Assembly (white) (#2588)

2" Eyepiece Holder L (#7509)

2" Eyepiece Holder S (#7508)

M57 to T Adapter (#7522)

80mm Dia. 205mm Tube (#7800)

Draw Tube Holder & Drawtube (#7749)

SLR Camera Mount Adapter (#7000)

Tube 150mm long (#7150)

Drawtube (#7137)

0.7x Triplet Multi Super Reducer (#7870)

Feather Touch Adapter 2.0" for Borg M57 (A20-229)

Feather Touch Rotatable 2.0" Diameter Dual Speed 0.8" Draw Tube Travel, Brake, 57mm Accessory Thread (FTF2008B-M57)
2 x M57 to M57 ADIII (#7459)

£1,789.00

Borg 71FL F3.9 Astrograph with 2" Feathertouch Focuser

The Borg 71FL f3.9 features a premium quality Fluorite objective from Canon and Borg's own 0.7x Triplet Multi Super Reducer with built-in camera rotator.

Fully optimised for wide-field astrophotography.

Covers a full-format 35mm sensor.

This fast 5-element astrograph is one of the finest imaging refractors available!

This version includes the Feathertouch 2" Focuser instead of the Borg #7835 helical focuser

Features

Canon Fluorite element
71mm ED doublet objective
0.7x triplet reducer (# 7870)
280mm effective focal length
Fast F3.9 focal-ratio
35mm full-frame coverage
2" Feathertouch Focuser

Includes

71FL Objective Assembly (#2571)
80 Dia. 50mm Tube (#7050)
80 Dia. 50mm Tube (#7050)
M77.6 to M68.8 AD (#7801)
2" Feathertouch Focuser
M57/60 Extension Tube S 20mm long (#7602)
0.7x Triplet Multi Super Reducer with camera rotator (#7870)

£1,615.00

Borg 77 EDII Astrograph with 2" Feathertouch Focuser

The popular Borg 77ED-II f4.6 astrograph features an ED glass element and the Borg 0.7x Triplet Multi Super Reducer with 2" Feathertouch Focuser for excellent results across a full-frame 35mm sensor.

Features

77mm ED doublet objective
0.7x Triplet Multi Super Reducer

355mm effective focal length
Fast F4.6 focal-ratio
Helical focuser

35mm full-frame coverage
2" Feathertouch Focuser

Includes

77EDII Objective Assembly (#2178)
80 Dia. 150mm Tube (#7150)
Drawtube for 7136 and 7150 (#7137)
Drawtube Holder (7753)
2" Feathertouch Focuser
0.7x Triplet Multi Super Reducer (#7870)

£1,395.00

Borg 71FL F6 Set B07160

The Japanese-made Borg 71FL f6 features a premium quality Fluorite
objective from Canon and Borg's own 1.08x DG Multi-Flattener.

Four-elements, fully optimised for astrophotography.

Includes a Borg Helical focuser for precise dependable focusing.

Covers a full-format 35mm sensor.

35mm full-frame coverage.

Features

Made in Japan
71mm objective with Canon Flourite element
1.08x DG Multi-Flattener (# 7108)
430mm effective focal length
Fast F6 focal-ratio
35mm full-frame coverage

Includes

71FL Objective Assembly (#2571)
1.08x DG Multi Flattener (#7108)
80mm Dia. Tube Set (#6000)

IDAS P2 LPS Light Pollution Filter

The Hutech IDAS P2 LPS is in our opinion the BEST Light Pollution
Suppression filter for astro photography with DSLR and colour CCD cameras.

Light pollution suppression (LPS) filters are designed to suppress the
common emission lines generated by artificial lighting, yet allow the
important nebula emission lines to pass, thus enhancing the contrast of
astronomical objects, particularly emission nebulae (see filter plots).

Unlike other light pollution suppression filters, IDAS filters are
specifically designed for balanced colour transmission using the IDAS
unique Multi-Bandpass Technology (MBT) process. The balanced
transmission allows colour photographs to be taken with minimal colour
cast to broadband emission objects such as stars, galaxies and globular
clusters.

Hutech IDAS LPS filters utilize the unique IDAS Ion Gun Assisted
Deposition (IGAD) coating technology for superior coating durability
(quartz hardness) and safer cleaning. IGAD coatings also improve
temperature and humidity stability, reducing spectrum shifts down to
+/-1nm from the +/-3 or 4nm shift of standard coatings.

CCD imaging can also benefit, because although CCD imagers can already
shoot through light pollution to some extent, including an LPS filter to
the setup gives an added (signal-to-noise) edge.

Note, however, that light pollution suppression filters are not a
perfect substitute for dark skies.

LPS filters are available in 1.25" and 2" threaded cells, other sizes
are available on request.