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Here is a Fairchild F-71 mirror stereoscope with handbook, instructions, military-green, wood box, and covers for the mirrors. I believe that these are WWII era and may have beenused to find German rockets. In excellent condition (works well with no known damage such as scratches) in cushioned wooden case (which has some scratches and worn areas) with a leather handle. F-71's are the standard for foresters, geologists, geographers,surveyors,cartographers, city planners, engineers, and military reconnaissance. One-piece cast aluminum body holds the precision mirrors at a stereo base approximately 11", permitting the operator to have complete separation of up to 10" by 10" aerial photographs containing a normal amount of overlap. Four legs fold for easy storage. Viewing lenses are set at a universally comfortable interpupillary distance. Optical system consists of two high-grade first surface evaporated rhodium coated mirrors, two 45 deg. prisms free of color fringe, and two precision-ground diopter lenses of approximately 11 1/2" focal length. Common field of view is 5" high and 7" wide. Prism and lens are sealed to keep out dirt. Dimensions: 4" wide x 8 1/2" high (5" high without legs extended) x 16" long (24" when legs are out). Checked on the web and these usually sell for over $700.00(e.g. http:// /product_pages/View_Catalog_Page.asp?mi=5870) .
(F-71 fairchild mirror stereoscope survey aerial wwii was posted and is owned by: Marcella Hansen) |
m_hansen@chicagopartsnetwork.com (Marcella Hansen) for more information.
