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Old 26-02-2013, 02:55 PM
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astronobob (Bob)
Casual Cosmos Capturer

astronobob is offline
 
Join Date: Jun 2010
Location: Gold Coast SE QLD
Posts: 4,472
Hi Ash, and welcome to the forum !

These two scopes have 'in my opinion' very different advantages and dissadvantages, therefore, straight up - Id go with the 130 : )
Main reason being, it comes with a far better mount, a lot sturdier, fine adjustment cables in both RA & Dec, & you can actually obtain a 'Polar Allignment' allowing you to adjust the RA to follow the target in the eyepiece
Also the 130 has more aperture and is quite a fast system, F/5, allowing bright & contrasty views, great for nebs & even galaxies, even better in good dark skies, the 20mm eyepiece is better for this, picking up faint fuzzies : )
The 10mm is better suited for moon and planets, even bright star clusters can be tested !

The 90mm is a slower system, F/11, good for planets, moon, not so good for galaxies & nebulae, besides I dont think that mount would justify the purchase quite frankly

Cheers & Hope this helps, pretty obvious to me

PS; Edit: Yes there is the foregone conclusion that an 8" dob would out-do both fore-mentioned scopes by far ! !
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