LARGE TELESCOPES MUST BE SHORT (Reference Isaac Newton in Opticks, 1704)

• Primary Mirrors Must Be “Fast”

• Mass = Money

• Newton’s 1st Telescope, f/4.8 Prim., 1667

• George Ritchey, f/4 Prim., D = 0.6m, 1890

• George E. Hale, f/3.3 Prim., D = 5m, 1948

• Jerry Nelson, f/1.2 Prim., D = 9.8m, 1990

• Roger Angel, f/1.1 Prim., D = 30m, 2015?

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