I see which one you mean in the photo Jimi but this double isn't in my original sketch. I'll certainly look for it next time though.
I see which one you mean in the photo Jimi but this double isn't in my original sketch. I'll certainly look for it next time though.
Howard
30-inch f/2.7 alt-az Newtonian
https://sites.google.com/site/howardbanichhomepage/
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Contributing Editor, Sky & Telescope magazine