Quote:
Originally Posted by doppler
I was wondering what a 9" f18 refractor would look like. Found this image, not quite f18.
9" F/14.8 1915 Alvan Clark in it's transportable tube assembly
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Here is another 9" F15 2012 model Oddie II 22mm F15 Istar achromat
http://i13.photobucket.com/albums/a2...psf66ca536.jpg