Three (3) unidentified scientists / astronomers with the 100- inch focal length aerial camera, on Mt. Wilson, for testing. The camera is mounted on wooden supports, and is in the back of a pickup truck. One of the men is behind the camera in the bed of the truck; the other men are standing on the ground, next to the truck. Written on teh side of the truck's door is "C.I. of W. Mount Wilson Observatory". Pine trees are visible in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Astronomers Scientists Cameras Cameras--Calibration Astronomical instruments Pickup trucks Rope Photography Trees Mount Wilson Observatory Mount Wilson (Calif.) Photographic prints. (gmgpc) Group portraits. (gmgpc) Portrait Photographs. (aat)
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