Choosing and Using a New CAT: Getting the Most from Your by Rod Mollise

By Rod Mollise

Catadioptric telescopes (CATs), reminiscent of the Schmidt Cassegrains, are more and more well-liked by today’s novice astronomers and are able to displaying even the amateur observer millions of gorgeous deep area wonders. glossy CATs, although, became more and more reliant on desktops. this enables them to immediately element to and tune celestial gadgets, making astronomy extra available to extra humans than ever before.

Unfortunately, due to the high-tech nature of those telescopes, settling on one and studying the way to use it is usually a tricky event for stargazers either outdated and new. That’s the place deciding on and utilizing the hot CAT is available in. This booklet publications even the main greenhorn astronomer previous the pitfalls encountered at the route to having fun with the beauties and mysteries of the universe.

Here you'll study not only which telescope is true for you yet tips to organize, function, and keep the main advanced and electronics-laden CAT. there are many counsel for conserving the recent CAT satisfied and dealing properly, and there's even tips on complicated functions, corresponding to hooking pcs to CATs and utilizing those telescopes to take beautiful photographs of planets and deep area gadgets.

This e-book provides readers the advantage of the author’s thirty-five years event utilizing and having fun with catadioptric telescopes and fixing the issues that unavoidably crop up. for those who dream of possessing a telescope or are annoyed through the telescope you already personal, this is often the publication for you!

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Extra info for Choosing and Using a New CAT: Getting the Most from Your Schmidt Cassegrain or Any Catadioptric Telescope

Example text

Renowned Japanese telescope manufacturer Takahashi, for example, produced only approximately 100 of its legendary TSC225 9-inch SCTs in the late 1980s. Belgium’s Lichtenknecker Optics has also made a few SCTs. Their 8-inch models are renowned for their optical quality, or so it seems. They are rarely seen. Why are no companies other than Meade and Celestron making SCTs today? Maybe this is because the other makers who have entered the SCT arena have been, like Takahashi and Lichtenknecker, focused on making the best SCTs it is humanly possible to make.

I was laid up for a solid week. After I returned from the star party, I determined that I still had a place in my telescope stable for an 8-inch CAT, which is superportable but with plenty of viewing horsepower for all types of sky objects. I decided no more crouching behind the non-go-to Ultima. What to do? Pony up for a new Meade or Celestron 8-inch? It seemed a waste to let those wonderful Ultima optics go idle. What if I removed the tube, the OTA, from the Ultima’s fork mount (a simple operation involving removing four screws) and put it on the Advanced Series’ CG5 GEM (which was available without an optical tube)?

The moving mirror focuser is smooth and focus shift is minimal, about 45 to 60 arc seconds in the examples tested. The 75’s tube is finished a gleaming white, a color that is extremely attractive and that matches the similarly finished mount. White is an unusual color for CAT tubes these days, but it may be a plus. A white finish may aid in the thermal cooldown that is necessary when an SCT is taken from a warm house and into the cold night air. The white tube may radiate heat away from the tube interior more quickly than a dark color.

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