March 8th 06, 04:52 PM
posted to uk.sci.astronomy,sci.astro.amateur
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Moon composite
Cheers Phil
I am off to look at these web sites.
Steve
"Phil Wheeler" wrote in message
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Stephen Jessop wrote:
Cheers Phil
Thanks for the advice, I would like to take photos as well at some date
so would a dobsan be good for this as well? Can it be motorised as well?
For visual use (not photographic) and as a first scope, a dobsonian of no
less than 8" aperture would be a good compromise of cost, ease of use,
transportability and optical grasp. With a larger aperture you would see
more .. so that becomes a personal choice (e.g., if you have a fixed
observatory, or are really dedicated to the hobby, you could consider
much larger scopes). But an 8" dob ala the Orion series would be a good
starting point.
There are ways to use a Dob photographically for brighter objects. There
is a website on that he
http://www.iceinspace.com.au/index.p...63,201,0,0,1,0
The most I've ever done is point a digicam at one and get some credible
moon shots (as those of Starboard recently posted here).
Some folks mount Dobs on equatorial tracking platforms, either homemade or
commercial. Here is a reasonably priced commercial example:
http://www.johnsonian.com/products/type6.htm
Here's a page about how they work, with some construction plans (there are
many such websites out there, I suspect):
http://homepage.ntlworld.com/molyned...l_platform.htm
I've not done this, nor seen it done, and do not know whether the tracking
performance would support astrophotography of dimmer objects.
Phil
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