Archive for March, 2004

Choosing a Telescope – Part 3

Wednesday, March 10th, 2004 at 8:34 pm  
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Catadioptric Telescopes Continued

The Schmidt Cassegrain is the most popular type. The Maksutov is a variation with a differently shaped corrector. The ‘Mak’ offers excellent image quality:- refractor like, although the thick corrector can cause thermal stability problems. In the past, these have been expensive but now Meade and Russian-built …

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Choosing a Telescope – Part 2

Tuesday, March 2nd, 2004 at 11:11 pm  
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Telescope Types:

Achromatic Refractors

Achromatic refractors are those with two lens elements at the front of a tube. They offer crisp, high contrast views due to their clear aperture; i.e. they have no central obstruction that reduces contrast. They also have a high transmission of > 90%. The light travels …

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