National Geographic : 1952 Feb
248 National Geographic Photographer J. Baylor Roberts Big Schmidt, Aimed Like a Cannon, Captures Starlight 300 Million Years Old Earth does not hold still for a sky photograph; the camera must pivot. To keep on target, Dr. Wilson here makes the 48-inch Big Schmidt track a guide star. This instrument is the invention of a German optician, the late Bernhard Schmidt. Working out a complicated mathematical formula, he designed a camera capable of photographing vast areas with no distortion at the edges. Palomar's 200-inch Hale telescope, Big Schmidt's teammate, can fathom a billion light-years, but its field of vision is narrow (page 256). Big Schmidt explores; Hale makes pinpoint analyses.