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Kaufmann Posographe – Antique French Photographic Exposure Calculator (c. 1900–1925)

Description
Rare and original Posographe by Kaufmann, manufactured in Puteaux, France, circa 1900–1925.
This ingenious exposure calculator was designed for photographers before the invention of handheld light meters, allowing them to determine the correct exposure times for glass plates and early films.

The Posographe provides detailed guidance (in French) for both indoor and outdoor photography, taking into account:

Aperture / diaphragm values

Subject type (portraits, flowers, details, etc.)

Light conditions (sun, shade, cloudy, interior lighting)

Window type (ordinary, double, large glazing)

Sky color and brightness (stormy, cloudy, blue sky, very clear)


The tool is mounted in a metal frame with sliding and rotating indicators, allowing the photographer to quickly adjust exposure depending on real conditions.

At the bottom is the maker’s inscription:
“POSOGRAPHE. Breveté S.G.D.G. Kaufmann, Constr. 11 rue de la République, Puteaux.”

Details

Maker: Kaufmann (Puteaux, France)

Model: Posographe

Period: Circa 1900–1925

Language: French

Material: Metal frame with printed exposure charts and movable indicators

Dimensions: Aprox: 13cm x 8cm

Condition: Good antique condition with age-related patina. Fully legible and complete (see photos).


Rarity & Collectibility
Kaufmann’s Posographe is highly sought after by collectors of antique cameras and early photographic accessories. It represents a fascinating piece of the history of photography, bridging the gap between guesswork and the invention of modern light meters.

Provenance
Private collection, France.

Shipping
Securely packaged and shipped with tracking.



Very good

Kaufmann Posographe Light meter

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