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Title: symmetrical lens [Go to resource]
Description: Symmetrical lens F.8 11 inch f.1 in a rigid mount; iris diaphragm operated by a lever projecting from the lens barrel. Steinheil. c.1890. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: symmetrical lens Temporal: c.1890 Source: Science Museum Creator: C.A. Steinheil Sohne Identifier: 1979-559/1294 Go to resource More Like this...
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