Achromatic telescope lens

Creates magnified images of astronomical objects. Original two-element objective lens for the 15-inch telescope by John Brashear, one of the top opticians in the world for refracting telescopes. It is designed to correct chromatic aberration of star images--without such correction the stars would exhibit coloured fringes. Canada Science and Technology Museum

John A. Brashear Co. Ltd., Pittsburgh, PA
Canadian Heritage Information Network, Canada Museum of Science and Technology, Musée de la civilisation, Stewart Museum, Canadian Medical Hall of Fame, Museum of Health Care at Kingston, University Health Network Artifact Collection, University of Toronto Museum of Scientific Instruments, University of Toronto Museum Studies Program, Suzanne Board, Dr. Randall C. Brooks, Sylvie Toupin, Ana-Laura Baz, Jean-François Gauvin, Betsy Little, Paola Poletto, Dr. James Low, David Kasserra, Kathryn Rumbold, David Pantalony, Dr. Thierry Ruddel, Kim Svendsen
1904 - 1905
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