An exposure calculator
Hurter
Category
Photographic technology
Date
1888 - 1900
Materials
Wood, Paper
Measurements
45 mm (Height); 112 mm (Diameter)
Place of origin
London
Order this imageCollection
Fox Talbot Museum, Wiltshire
NT 1525136.3
Summary
An exposure calculator mounted on a polished wood circular platform. Some of the parameters used in the table are: Exposure in second to a standard candle at one metre distance Inertia in cms Distance in centimeters from one inch of magnesium ribbon of various densities H&D plate speeds and stops for daylight exposure. The inner disc rotates to perform the required calculation.
Provenance
Part of The Fenton Collection. A gift from British Film Institute in 2017. From 1986-1999, part of BFI collection for the Museum of the Moving Image. BFI purchased collection in 1986 from James Fenton's Museum of Photography, Port Erin, Isle of Man 1976-1986
Makers and roles
Hurter , manufacturer