Le Vade Mecum Exposure Calculator
Category
Photographic technology
Date
1900
Materials
Wood, Brass, Glass
Measurements
21 mm (Width) x 7 mm (Depth); 192 mm (Length)
Order this imageCollection
Fox Talbot Museum, Wiltshire
NT 1525011
Summary
A Chronopose 'Exact' Le Vade Mecum Du Touriste Photographe. This is a wooden slide rule unit which converts a light reading to an exposure for a given plate sensitivity. The front has exposure times ranging 64- 1/100 sec and the F range, applying to both speed and aperture goes 3-144. The scales are headed 'Chronopos Exact De Cannevel Brevete S.G.D.G.' and the slider is marked 'Congres Paris'. The back has a metal slide with instructions printed. Above this is ' Le Vade Mecum Du Touriste Photographe'
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