Im rather new to LARGE dob scopes, but throughly enjoy reading about designs and configurations of many units available. However, being rather new to this hobby, Im not sure of a couple of things that may help me decide which sizes I would need for order.
First off, what does the "F" mean, when many scopes are referencing F5 or F8's. I don't expect anyone to hold my hand and teach me, however a link to a website where I could read in detail, all the information would be quite helpful.
Second, of course I am deffinatly interested in solar planetary viewing with great clarity and crisp images, But my main interest is galatical viewing, nebula's, black holes, etc. I understand that I won't see anything simular to a hubble scope photo due to it being a combination of UV, and x-ray overlays...but seeing these wonders would be phenomenal to me. So, my question is...what size mirror's would I need to view these wonders?
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