Wynne’s Infallible Exposure Meter
Infallible Exposure Meter Co
Category
Technological items
Date
Unknown
Materials
Place of origin
Wrexham
Order this imageCollection
Fox Talbot Museum, Wiltshire
NT 101924
Summary
Actinometer exposure meter in fob case The time taken for a piece of sensitised paper to darken to match a grey patch indicated exposure times
Makers and roles
Infallible Exposure Meter Co