Quote:
Originally Posted by hellaflush
What kind if a difference am i going to see between a 6" and 8" Dob?
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An 8" will show images nearly twice as bright to that of a 6" (64/36=1.78). I also recommend either an 8" Dob or if money is an issue, a 6" Dob. Either telescope will give you a lifetime of viewing pleasure.
Note views of nebulae will be nothing like the photos. You will see no red or blue colour as the light is too dim. Even the Great Orion nebula (one of the brightest) show a whispy white/grey sometime subtle green visually but it is a most impressive sight.
Forget about astrophotography with a Dob other than snap shots or video of the Moon. You need a tracking platform and the ability to guide to do astrophotography. If you want to do astrophotography get an ED80 and HEQ5 mount later. You will also need a guidscope and autoguiding CCD; an ST80 is light and can mount on top of the ED80. Unfortunately the $$$ are a lot more for even the most basic astrophoto package. The ED80 can also be used visually and the images are very good on planets, and the Moon. Nebulae are just a little dimmer, nearly 1/4 to that of a 6" (10/36).