Question

what is the focal ratio for a 50inch dobsonian telescope?

Answer 1

what would the average ratio be, i dont have any numbers to work with

Answer 2

That's very specific. You'll find it on this page: search for "focal length"
http://www.telescope.com/Telescopes/Dobsonian-Telescopes/Truss-Tube-Dobsonians/Orion-50-Monster-Dobsonian-Telescope/pc/1/c/12/sc/29/p/9162.uts

Answer 3

And seriously Brent, this sort of very specific question should be answered by you using some internet research tools, like google. It took me 30 seconds to find this page with the answer.

Answer 4

ok?