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Old 17-06-2009, 10:26 PM
Wavytone
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Wavytone is offline
 
Join Date: Jul 2008
Location: Killara, Sydney
Posts: 4,147
Quote:
Originally Posted by Marclau View Post
I'm assuming the 30X100 will give me some serious good viewing of planets, starts and galaxies
Hmm... much the same aperture as my refractor and not a lot smaller than your 5" - I'd say these will give you much the same as what you see with your 5" if you use the right eyepiece to give 30X, probably something in the range 25-40mm. Magnificent for trawling the Milky Way in dark skies and good for comets.

But for planets, you need both more aperture and a lot more magnification - which means a much longer focal length than binoculars have.

As for galaxies these are way too small - there is no substitute for aperture and 20cm is the minimum, at 30cm aperture you'll start to see interesting things.

I'd suggest a modest Dob would be a better choice - 20-25 cm, easy to set up, easy and comfortable to use and best of all, able to give much better views of planets and galaxies than the binoculars.
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