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History of Science Museum

Lancaster Wide-Angle Rectilinear Doublet Camera Lens

Inventory Number 89968


Acknowledgement: © History of Science Museum, University of Oxford, inv.89968

Item type
Object
Makers
Lancaster
Primary inscriptions
'J. Lancaster & Son Birmingham 10 20 30 40 TIME 1 2 4 8 16 1/2 hl W.A. Patent, Rentigraph'
Physical material
copper alloy
Glass
Dimensions
Diameter: 52mm Height: 29mm Weight: 133g
Inventory No
89968

Description

Wide angle Rectilinear doublet lens, manufactured by J. Lancaster & Son. Consists of a copper alloy body tube with a convex lens mounted at either end. These lenses are mounted either side of a retracting iris. Iris is controlled by rotating the centre section of the body tube. Lower lens rim is mounted in a circular plate which has a screw thread around its edge.