Quote:
Originally Posted by renormalised
Ron is right....unless you ground your own mirror to the specs you wanted, you would have to get one especially made. Most of the mirror makers do short focal length mirrors, but if you asked, I would imagine one of them would be more than happy to make you a long focal length mirror.
Mind you, with anything over 8-10" in mirror aperture you'd need a damn tall ladder to look through the eyepiece!!!!.
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I will.
Later this year i'll pay someone to make a good mirror for me. I will make the best planetary telescope in the southern hemisphere. 20" f/15.
just kidding, 15" f/9 or something will do.
Oh I'm silly today. I think Patrick Moore has something like that, so I will need an f/12 to keep up appearances:
OOPS, no he has a 15" f/6.
http://www.astro-sharp.com/pm_restoration_page3.asp
It's ok... I have a big backyard. I am sooooooo gonna do this! The long-focus revolution beginneth!
