This range was complemented by an increasing selection of high quality Minolta SR mount Rokkor lenses, within a few years ranging from 35mm to 600mm, and an RF 800mm f8 mirror lens in 1960, some of these even multicoated from the very start.
These were the first type of antireflection coating known, having been discovered by Lord Rayleigh in 1886.
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The Chandra x-ray mirrors resulted from over two decades of collaboration between Van Speybroeck and colleagues at the Smithsonian Astrophysical Observatory and scientists and engineers affiliated with NASA's Marshall Space Flight Center, TRW Inc., Hughes-Danbury (now BF Goodrich Aerospace), Optical Coating Laboratories, Inc.