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AP Basics: Kit


Sharpe

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OK Astro CCDs are not really suitable for planetary (May do for lunar) since what you need is a fast frame rate so you can stack hundreds or thousands of short (1/20th to 1/50th sec) exposures to catch the fleeting moments of clear seeing. Astro CCDs are designed for long exposures of minutes at a time.

A separate guide camera / scope is mounted next to the main scope, and all it has to do is look at one star and tell the mount how much it has moved from where it should be, and how much the mount has to correct its tracking to bring it back where it should be.

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RikM,

Many thanks for your post that is exactly what I was looking for.

I very much appreciate this is not the idea set up but it's all I can hope for until this time next year at best. As you say by doing it wrong it will teach me a lot about what I need in the future.

Will this method be acceptable for the moon and planets or will that absolutely require a Web cam (noting that I think my DSLR has a video)?

Also in the future I would expect (once I have the GEM) to purchase one of the astro specialist CCD cameras with a filter wheel- will that be OK for plants/moon shots or would I still require a Webcam?

Finally there are two items that confuse me - guide scopes and auto focuser. What role do each of these items serve and when are they needed?

Many thanks again,

-Sharpe

For the moon, your dslr is perfect, you dont need video for it :-)
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