How about that - I'd never read that WH tried a glass mirror - thanks for the info Ivan!
How about that - I'd never read that WH tried a glass mirror - thanks for the info Ivan!
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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