For Sale: A must have accessory for your SCT Sold

[lhansen (Lars)]

If you have a SCT up to 9" in size (or larger if you are clever) then this is for you. Read blurb below:

A common limitation that plagues owners of most popular Schmidt-Cassegrain telescopes is the narrow field size and high magnifications produced by their slow optical system (typically, f/10). Until now, owners of SCTs have lacked a truly versatile and high-quality method of reducing their f/10 (or slower) systems for faster, wider, photographic/CCD and visual fields. (note: the telecompressor is not intended for use with the Meade native f/6.3 SCTs). Using the Alan Gee with 1¼” eyepieces can yield actual fields of view that match or exceed what you could only achieve with expensive 2" eyepieces!


Baader Planetarium has developed a truly unique and extremely versatile telecompressor system that delivers the finest wide flat fields your SCT is capable of. The key to the Alan Gee Mark II Telecompressor is its innovative optical and mechanical design. Unlike the commonly available and simple single-purpose solutions, the Alan Gee Telecompressor Mark II has been engineered specifically to work well with SCTs in a wide variety of visual and imaging configurations. The unique design of the Alan Gee Telecompressor positions the lens elements several inches inside the telescope's central baffle tube (see the C8 Cutaway, which shows the lens mounted in the standard imaging configuration). The result is a sharp, wide, flat field, at a fast focal ratio of f/5.9 – and it even works superbly with Baader Planetarium, Zeiss, and Celestron Binocular Viewers!


That's right. The Alan Gee Mark II is designed to function with many popular binocular viewers. At last, you can use your large aperture SCT to produce stunning wide field binocular views. For more information on this unique telecompressor system, including some sample CCD images, please click on the link below.

And its optics was design by Roland Christen of AstroPhysics, it don't get much better than that.

I've used it once, then I sold my scope to get a big apo. It is as fantastic as described. It also comes with the Baader short T adapter.

I paid USD$278 + shipping for this fine pair. You can have it for only AU$250.

[[1ponders] (Paul)]

What is its imaging limit (chip size) for vignetting Lars?

[lhansen (Lars)]

You know I did see that written down somewhere. If you don't mind I'll do a bit of investigating and get back to you on that. Alternatively check out the alpineastro website. Obviously the configuration in which it is used (one or two extension tubes) has an impact on that

What I have in my documentation says that is is designed to deliver a wide flat field for 35mm photography. Now that does not tell me much about the unvignetted field size but I aware of it being used with imaging cameras up to the SBIG ST10 MX in size.

Cheers

Lars

Originally Posted by [1ponders]

What is its imaging limit (chip size) for vignetting Lars?

[acropolite (Phil)]

PM Sent