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URGENT TELESCOPE HELP NEEDED

 
STUPID
User ID: 184356
Australia
01/26/2007 10:39 PM
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URGENT TELESCOPE HELP NEEDED
Can someone help me out-- Have a Tasco 500 refractor telescope and some lens-I would like to look at the comet--by have no idea which of the following to use??
10mm Long Eye
20mm Long Eye
Barlow x 2
15mm Plossl
SR4mm

Which combo would be best??
Anonymous Coward
User ID: 83027
United States
01/26/2007 11:06 PM
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Re: URGENT TELESCOPE HELP NEEDED
Your lowest power combination will give you your best view.
Good Luck
User ID: 168870
United States
01/26/2007 11:12 PM
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Re: URGENT TELESCOPE HELP NEEDED
I gather that YOU are in a position to even think about seeing it. [Southern Hemi ?] I can't see it a'tall.

To you question: Since this is a 'large' object, you would do best at the lower powers, when your [probably] f/10-15 refractor might get some traction as an RFT (Rich-Field Telescope).

Power is your Objective Lens focal-length divided by the eyepiece value [focal length in millimeters as noted].

Your probably going to see the largest field of view [area of the sky] using the 20 mm job. Likely magnification of 25-40X or so, depending.
Anonymous Coward (OP)
User ID: 184356
Australia
01/26/2007 11:37 PM
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Re: URGENT TELESCOPE HELP NEEDED
Can I use the 20mm with the barlow??
Anonymous Coward
User ID: 83027
United States
01/26/2007 11:45 PM
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Re: URGENT TELESCOPE HELP NEEDED
Don't use the barlow, stay with either the 20mm or 15mm eyepieces by themselves. I'm assuming that your scope is a 50 or 60 millimeter objective in a f10 or better focal length. DO NOT try to amp up magnification in such a thing. The view will be fuzzy, dim, and twitchy.
Anonymous Coward (OP)
User ID: 184356
Australia
01/26/2007 11:46 PM
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Re: URGENT TELESCOPE HELP NEEDED
bump
Anonymous Coward (OP)
User ID: 184356
Australia
01/26/2007 11:48 PM
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Re: URGENT TELESCOPE HELP NEEDED
Thankyou very much Ac --I will just use the 20mm.
Anonymous Coward
User ID: 83027
United States
01/27/2007 12:07 AM
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Re: URGENT TELESCOPE HELP NEEDED
I would think that probably the best view of this thing would be under dark skies with a decent set of 8x50 or 10x60 binoculars. A pair with medium to low power with large objective lenses. Your going to want maximum field of view. Field of view decreases in direct proportion to the amount of magnification you attempt to apply to a given objective lens diameter. Not to mention making the image darker.

Of course one of those huge sets of Orion binocs in the 20x100 range would be pretty awesome for something like this. (on a tripod of course)

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