[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: [ATM] Fast primary unobstructed telescope
Quoting Kevin Whitefire <chaosopher23@yahoo.com>:
> I have a primary that's 13.25" in diameter with f/D of
> 3.125, give or take a little. Its exact ratio isn't
> closer than a quarter inch accuracy, using a solar
> focus on a white surface.
And you state it as 3.125? ;-)
Hermit, holed up in Youngstown, Ohio
_______________________________________________
ATM mailing list http://www.atmlist.net/