Download Choosing and Using a Schmidt-Cassegrain Telescope: A Guide by Rod Mollise PDF

By Rod Mollise

Amateur astronomy is changing into an increasing number of renowned, normally as a result availability of really inexpensive astronomical telescopes of great caliber - commercially-made Schmidt-Cassegrain and Maksutovs. Rod Mollise's booklet comprises every thing beginner astronomers want to know approximately those telescopes. that includes (but no longer completely) the ever-present Meade and Celestron levels, he describes what those tools will do, the best way to use them, and that are the simplest to decide on. This ebook contains every thing! There are sections on components, gazing options, and tricks and information gleaned from his 25 years adventure with this sort of telescope: cleansing, collimating, retaining the telescope and mounting; utilizing the telescope in a variety of stipulations; machine keep watch over; imaging (wet, electronic and CCD). this can be the precise ebook for beginner astronomers who're approximately to take a position in a brand new Schmidt-Cassegrain or Maksutov telescope, or when you have already got one and need to get the easiest out of it.

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Additional resources for Choosing and Using a Schmidt-Cassegrain Telescope: A Guide to Commercial SCTs and Maksutovs

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Not only do they produce wider fields. They require shorter exposures than longer focal length telescopes do. This is really nice, because a photographer must expend a lot of effort keeping the telescope tracking a guide star throughout an exposure. It's easy to see why shorter exposures are possible with lower f-ratio scopes. When taking pictures of an object, an eyepiece is not used to magnify the image produced by a telescope - the telescope becomes the camera's lens. The image it delivers to film is the lowest possible magnification possible for its objective size/focal length.

They have to do a lot, and their prices have to be kept within the reach of the average advanced amateur astronomer. Because of these facts, there is simply no way they can be expected to be as reliable as, say, a basic-level SCT whose drive consists of a simple battery powered electric motor. If, for any reason, you cannot stand the idea of having your telescope out of service for maintenance, you should probably pass up these most sophisticated and complicated CATs. Many long-time amateur astronomers would also tell you there's another reason for avoiding a goto scope if you're a beginner.

But the corrector includes an additional circuit, one which varies the frequency of the alternating current output when a button is pressed. Varying the frequency of AC current up or down speeds up or slows down your synchro motor for photographic guiding. Most drive correctors feature wired remote controls. These hand paddles are equipped with at least two push-buttons that correspond to east and west. Some drive correctors also have DC outputs for small declination motors and buttons for north and south as well.

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