An Artificial Light Exposure Calculatore
Johnsons of Hendon Ltd.
Category
Photographic technology
Date
1950 - 1955
Materials
Plastic
Measurements
65 mm (Diameter); 3 mm (thickness)
Place of origin
Hendon
Collection
Fox Talbot Museum, Wiltshire
NT 1525570.3.1
Summary
An Artificial Light Exposure Calculator. This is a rotatable disc in a casing. On the front the label is 'Johnson Artificial Light Exposure Calculator'. Basic instructions are also printed. The user dials in the power of the lighting units and their distance from the subject. On the rear are settings for light angles. Results are shown on a scale in which apertures range f2-f16 and shutter speeds range 30 sec to 1/1000 sec.
Provenance
Donated on 1/08/2016 to The Fox Talbot Museum by Mr A E Burch.
Makers and roles
Johnsons of Hendon Ltd. , manufacturer