Wynne’s Infallible Exposure meter 102025 | National Trust Collections

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Wynne’s Infallible Exposure meter

Infallible Exposure Meter Co

Fox Talbot Museum © National Trust / Alan Bekhuis

Fox Talbot Museum © National Trust / Alan Bekhuis

1
2

Category

Technological items

Date

Unknown

Materials

Place of origin

Wrexham

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Collection

Fox Talbot Museum, Wiltshire

NT 102025

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

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Place of origin

Category

Technological items (2836)

Collection

Fox Talbot Museum, Wiltshire (29836)

Maker

Infallible Exposure Meter Co (5)