Imperial Exposure Meter
Object numberS227
TitleImperial Exposure Meter
Creator Ltd. Imperial Dry Plate Co., The (manufacturer)
DescriptionCalculator table for determining exposure time; works on principle of exposing a small circular area of light sensitive paper and using time taken for paper to darken to same tint as surrounding coloured patch.
Production placeCricklewood, London N.W.
Production date 1901
Object nameexposure meter
Object category2.865
Materialcard & paper
Dimensions
- height: 6.4 cm
diameter: 9.5 cm