Excellent sketches Uwe, and your Horsehead looks just like the views I've had with my 28 inch at Steens Mountain - beautiful!
Howard
Excellent sketches Uwe, and your Horsehead looks just like the views I've had with my 28 inch at Steens Mountain - beautiful!
Howard
Howard
30-inch f/2.7 alt-az Newtonian
https://sites.google.com/site/howardbanichhomepage/
https://sites.google.com/site/sprays...pemirrors/home
Contributing Editor, Sky & Telescope magazine
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