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History of Science Museum

Hardcastle Extra-Rapid Rectilinear Camera Lens

Inventory Number 63930


Acknowledgement: © History of Science Museum, University of Oxford, inv.63930

Item type
Object
Primary inscriptions
'Manufactured for Hardcastle & Co BRIGHTON E.R.R 6 1/2 x 4 3/4 f 8 11 16 22 32 44'
Physical material
metal
Glass
Dimensions
Diameter: 67mm Height: 57mm Weight: 177g
Inventory No
63930

Description

Two convex lenses housed at either end of a cylindrical tube. One end of tube is attached to a wide circular plate with two small holes for attaching lens to other components. On side of tube is a graded scale from 8- 44 below a twisting mechanism. This mechanism controls an opening and closing iris in the middle of the tube, which affects the light levels flowing through the lens. The manufacturer's name is also engraved on the side of the tube.