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Moozai
newbie
Reged: 05/17/08
Posts: 4
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Hi,
I'm looking to buy a new telescope for viewing and for astrophotography. My budget is around 2500-3000$. I'm looking for a telescope easy to use, like a GOTO system and i don't want to waste 30 minutes to calibrate my scope, i heard there's some scopes that all you need to do is to point to 2-3 stars and there we go, no polar alignment.
Sorry for my bad english and thanks for your help!
-Moozai
Edited by Moozai (05/17/08 02:04 PM)
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Kenny2004
Pooh-Bah
Reged: 08/17/04
Posts: 1317
Loc: Toronto, Canada
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GOTO systems are very popular and you definitely have your choices to choose from.
You might want to consider to what degree of astrophotography you plan on. Are you just interested in imaging planets? If so, you can get by with an alt/az goto mount. However, if you are planning on doing long exposure imaging such as in deep sky objects, you'll want to be polar aligning your scope. The reason being that with Alt/Az, there's the variable of field rotation that you have to be concerned about.
You can most definitely image in Alt/Az, but if you want greater detail, you definitely need to go to polar alignment.
I think the bottom line is you have to know what kind of imaging you want to do, and to what extent.
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Celestron CPC800XLT
Meade ETX-70AT
Meade ETX-125AT /wUHTC
Meade DSI-C
Meade DSI II Pro
Philips SPC900NC Webcam
Celestron NexImage
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Moozai
newbie
Reged: 05/17/08
Posts: 4
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Hi,
Thank you. Yes, i want to take pictures of deep sky objects.
So i know that i have to take an equatorial mount, i saw the Celestron C8-SGT telescope . But i think that if i go with that one it might by hard again to polar align.
Any one has that one and and use it for photography? And if it is hard to setup?
Thanks
Edited by Moozai (05/17/08 04:19 PM)
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Nils_Lars
professor emeritus
Reged: 01/04/08
Posts: 605
Loc: Santa Cruz Mountains , CA
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Polar align is easy with the polar align scope that is in the mount , you just look though and put polaris in the circle and then do a 2-3 star align and your done.
All together it takes maybe 10 minutes and its good enough for short AP.
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Erik
Celestron C6S-GT
Various eyepieces and other gear
Baytronix 80mm guidescope
Orion Starshoot Autoguider
PHD guide
Canon 400D (unmodded)
Stilleto Focuser
Tamron 75-300mm&28-80mm lenses
NexImage webcam
http://home.comcast.net/~eriknlarsen/site/?/photos/
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WadeH237
sage
Reged: 02/24/07
Posts: 286
Loc: Snohomish, WA
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The mount with the C8-SGT is very easy to polar align.
For visual use, you can just set it up and use the mount's alt and az controls to point at Polaris. After that, the mount will track just fine, even at higher powers.
For solar observing during the day, I don't even do that much. I just set the mount up so that it's pointing north and guess at the altitude. That allows me to easily track the sun for 15-30 minutes at a time with my PST.
If you want to get a fairly accurate polar alignment, I would skip the polar alignment scope. The hand controller has a polar alignment routine built into it that uses the main scope. This is much more accurate than the polar alignment scope and only takes 5 to 10 mintes. Once you do this, the mount would track visually all night long.
I bought my mount as part of a C6-SGT. I've since mounted my C8 on it, and I think it's an ideal combination between scope and mount.
Thanks,
-Wade
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Stuff
Visual Stuff (shared with wife and kids, 10 & 12): Celestron Nexstar 5, Generic 6" F/8 Dob, Celestron C6 or C8 on ASGT mount, CGE-1400, Coronado PST, 12x70 Binoculars.
Imaging Stuff: Meade 8" LX200ACF with Optec TCF-S focuser on CGE mount, SBIG ST-10XME with CFW8, Astrodon filters, Canon EOS 20D.
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