Homemade 'scopes 8"f/7,6" f/5", 6"f/4, 4.25" Schiefspiegler,60mm Coronagraph,60mm H-alpha system, 4.25" White-light Solar Newtonian,solar spectroscope, 4" f/12, 4.5" f/16 & 6" f/12 Schupmann Medial refractors, 4" Celestar, 19 Stellafane awards 9 in optics Engineering = Taking what you have and making what you need.
Tak-106, AP900GTO, Unitrons, Masuyamas
The optimist thinks this is the best of all possible worlds. The pessimist fears it is true. "J. Robert Oppenheimer"
Quote:Dave, i`m curious, is there any purpose to the cross lines etched across the back of that secondary mirror ?
they were originally F15. Do you have a different secondary?
Quote: This scope looks to be based on what is described in Ken Novak's book "Cassegrain Notes". Here is a link to it.
I want to do more then just look.