Johnson Exposure Calculator.
Johnsons and Hendon
Category
Photographic technology
Date
Unknown
Materials
Plastic, Metal
Measurements
0.2 mm (Height); 65 mm (Diameter)
Place of origin
London
Collection
Fox Talbot Museum, Wiltshire
NT 1525824.1
Summary
Johnson Exposure Calculator. The whole is a Johnson Exposure Calculator, plastic with a white background and the text is black and red. The side of the calculator allows for the tuning to match data. Side 1 of the calculator has the following information and text – LATITUDE N COMPLIED IN ACCORDANCE WITH THE BRITISH STANDARD PHOTOGRAPHY EXPOSTURE TABLES In a circle in the middle are the headings – MAY, JUNE, JULY, AUG SEPT, OCT, MAR, APR NOV TO FEB FILM SPEED, BSI/SCH WEATHER Within these sections are times, film speeds and weather conditions. Side 2 of the calculator has the following information and text – This side has the numbers for the user to adjust depending on the outcome of the photograph, i.e., type of weather, time of day etc.
Provenance
Donated to the Fox Talbot Museum by J. Hogwood.
Makers and roles
Johnsons and Hendon, manufacturer