arrettinator
Jan 19, 2007, 3:31 PM
Views: 1095
Registered: Oct 30, 2002
Posts: 8522
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petsfed wrote: /physics and astronomy student near graduation
I have a 6" f/5 parabolic primary. Think of a folded newtonian, but instead of a flat secondary I want to use a spherical secondary. I'm having trouble figuring out what fl secondary to use. I'm thinking it's going to be a 2" spherical w/ a smaller flat diagonal, as well. This is just me brainstorming. I've got the newtonian design already for this primary, but am bored with it already. I am losing illumination w/ the bigger secondary, but I can't afford a bigger primary. I'll probably get at least an 8" primary, or 10" some day, but for now this is what I'm working with. Any suggestions.
(drawing not to scale, obviously)
(This post was edited by arrettinator on Jan 19, 2007, 3:32 PM)
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gfn.jpg
