History of Astro-Physics APO lenses

Discuss practical questions about using equipment,
finding celestial objects etc.
Solar B
Posts: 162
Joined: 07 Dec 2006, 23:00

History of Astro-Physics APO lenses

Postby Solar B » 05 Dec 2008, 22:33

Heres an article that Pete and I found very interesting on the history of APs APO lenses...the article is by the late Thomas Back founder of TMB.

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