PAP Chronoscope Actinographic Light Meter
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PAP Chronoscope Actinographic Light Meter




Category: Cameras


Unusual meter, patented by Paul Boucher of Paris, which produces a small paper negative of the subject. The front cap pulls off to reveal a large plano-convex lens, at the back of the meter is a magazine holding a stack of sensitive paper. The image produced can be viewed in subdued light, medium densities in the negative were compared to standard tints painted on the front of the paper-magazine. The closest matching tint and the time taken to reach that tint were then found in a table which gave the exposure time.

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FR Toby Whitfeld

Toby Whitfeld

I first started selling vintage cameras in Camden Town, London in 1981, then moved to Portobello Rd in 1985, where I started adding scientific instruments to my stock. I also exhibited at the Scientific Instrument Fair in London in the 1990's, but left the UK to live in Southern France in the year 2000. I started trading again in 2009, and since then I have been sourcing items in France and UK for clients here in Perpignan and back in UK.