Photometre - Antique and Vintage Cameras

Photometre

1887

J. Decoudun

Paris

France

Image of Photometre

Meter Type:
Extinction.

Calibration:
Exposure range: 4/10s - 6m.

Attributes:
French text.

Photometre

Meter Type:
Extinction.

Calibration:
Exposure range: 4/10s - 6m.

Attributes:
French text.

With:
Cardboard box.

Probably the first extinction meter to be widely available. The meter is held against the ground glass screen, a disc perforated with a series of holes is rotated and viewed through a slit in the meter case. The extinction point is when three small holes become indistinct whilst a larger hole can still be seen. This gives a value which is then found in a table giving the exposure time required, the reading is taken with the working aperture set on the lens. The text on the printed label varies. In Britain the meter was sold by the London Stereoscopic Co.

References & Notes:
BP 13332/1887. BP 11578/1888. PA 1891, p. 417. YBP 1888, pp. 31, cxxxix.

Le Photometre Normal

1903

E. Degen

Paris

France

Meter Type:
Extinction.

Calibration:
Plate speed: Ultra Rapid, Extra Rapid, Lentes, Tres Lentes. Shutter speed: 1/250 - 80s. Aperture: 2 - 200 Zeiss, 96 - 2 Goerz, 1 - 64 US, f2 - f32, f1.8 - f40.

Notes:
Address on instructions: E. Degen. 3 rue de la Perle. Paris.

With:
Instructions. Case.

This meter has two movable variable density wedges, one is set to the diaphragm to be used, the second wedge is then moved to the indistinct point, the shutter speed and aperture can then be found against the plate speed. Degen was established in 1865.

References & Notes:
BP 27986/1903.

Extinction

Photometre
Le Photometre Normal

Heyde

Diaphot

Wellington, McMurtry, Low's

Justophot

Lios Actinometer, Lios Scop

Practos

Dremoscop, Leicascop
Instoscope

Bewi

Leudi, Imperial, Pierce
Hauff, Expophot

Corfield
Nebro Visual
Ludac

Addiphot, Addex
Perfectus

Pelmet, Plex, Rollei


Meters Home page