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Old 24-07-2009, 12:03 AM
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mental4astro (Alexander)
kids+wife+scopes=happyman

mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 5,005
Hi Skids72, welcome to IIS, .

Your new 8" scope, like Rob66 said, is a fine instrument. It will give you splendid views of the sky. If I may, I'll add a couple of points to help you along in case you may not be aware:

* Scopes have a min & max magnification, with the following rule parameters:
Min. 3.6X per inch of apeture
Max. 50X per inch of apeture

So your scopes min & max would be 30X & 400X respectively ( the ability to use 400X is greatly dictated by atmospheric conditions).

*Eyepieces (EP) giving these values would be 40mm (for min) & 3mm (for max). Any EP you purchase would lie within this range. I'm an advocate for spending pennies on EPs rather than a barlow.

Just be aware that at 400X you will have a hell of a time keeping the object in the field of view. Anyone else who doesn't know how to nudge the scope will have no chance.

I had a chance to view through a dob just like yours last Saturday at a dark site, & compare its image quality with my 17.5" dob. If all I had was your scope, mate, I'd be very, very happy with it. Its slightly slower focal ratio, f/6, compared to f/4.5, my mate's 8" actually gives better images of the planets, using identical EPs.

The following link is to some inexpensive EPs (about halfway down the page). The GSO's EPs do have a following. They are good to start gaining experience with, & not injure the piggy bank:

http://andrewscom.com.au/site-conten...tm#accessories

DSO's benefit mainly from a dark sky. A nebula filter will help with nebulae if viewing from light polluted areas, except galaxies.

Be patient with your new scope. If you live in a very light polluted area realise that it will really degrade the image, as will turbulant atmospheric conditions. You will see more with the more you use it, regardless of the EP you use.

The EP forum has lots & lots of info to help out some more.

Mental.
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