We are moving to new offices, if you need assistance you can reach us at sales@buytelesopes.com

Stock photos provided by the manufacturers may not represent the actual item. Please verify this picture accurately reflects the product described by the title and description before you place your order.

Universal Alan Gee II - Telecompressor (UAG II)

  • Schmidt-Cassegrain telecompressor/reducer and flatfield-corrector
  • For Schmidt-Cassegrain-telescopes with 2" eyepiece clamp or for direct connection to SC-thread through Baader T Adapter (BTA) for SC and MAK Telescopes (T-2 part #21) (#2408160) or Baader SC / HD Ultra Short T-Adaptor, 7mm optical length (#2958500B)
  • Variable reducing factor 5,9 to 3,5
  • Preconfigurated for use with T-2-thread of the Maxbright® II binocular and for Mark V Großfeld (Giant)-Binocular (#2456410) with T-2 quick changer
  • Can be used with T-2-eyepiece-clamps
  • Baader T-2 / 7.5 mm Extension Tube (T-2 part #25C) (#1508155) is included

Universal Alan Gee II - Telecompressor (UAG II)

The Universal Alan Gee II is the only telecompressor/reducer on the market which works fine with a binoviewer.

The standard Alan Gee Telecompressor Mark II was designed by Roland Christen (the producer of AstroPhysics apochromatic telescopes) as a reducer for Schmidt-Cassegrains which also delivers a flat field. The Universal Alan Gee II (UAG II) puts the optical elements of the Alan Gee in a regular 2" nose piece with an additional T-2-thread on the telescope side. The UAG II can be used for visual observations with Celestron EdgeHD telescopes. too.

The combination: Mark V Giant Bino / Baader 35mm ED-eyepieces / Universal Alan Gee II (UAG II) / Baader T2 Prism delivers a field of view of ca. 1,2° when used with a C8 – that's 72 minutes of arc, as much as a 2" 40mm eyepiece will show you! So, instead of waiting for an (unaffordable) 2" binoviewer, you can achieve the same effect on most SC-telescopes with the UAG II – be it monocular with a star diagonal or binocular with a binoviewer!

Please note that the reducing factor of the UAG II only depends on the distance between UAG II and eyepiece. It is designed for a working distance of 121mm then you get a reduction factor of 0.59. But if you focus to a focus plane farther away than the designed back focus of a Schmidt-Cassegrains or EdgeHD telescope, the focal length of the telescope itself becomes longer, and you get a different reducing factor than that which is calculated only from the distance between reducer ad eyepiece. The result depends on the individual adaptation and the telescope, we can't give a universal value for the reducing factor – but you will clearly notice the much larger field of view.

Customers Reviews

Share your opinion with other customers

Write a review