Justophot - Antique and Vintage Cameras

Justophot

1924

Early model

Drem

Vienna

Austria

Image of Justophot

Meter Type:
Extinction.

Calibration:
Film speed: Aut, O3, O2, R, ER, UR. Shutter speed: 1/200 - 240s. Aperture: f4.5 - f36.

Attributes:
Finder shows figures of 1/25, 1/5, 4, 30.

Identification:
Black body. Round eye-shade.

With:
Box.

Justophot

Model 4

Meter Type:
Extinction.

Calibration:
Film speed: Comm, Com O, Roll film, PAR, Film P, Super, Extra. Shutter speed: 1/1500 - 30m. Aperture: f1 - f45.3.

Attributes:
Filter factor. Eyesight setting. Finder shows figures of 1/25, 1/5, 8, 2m.

Identification:
Black body.

Serial Number:
21682 .

With:
Case, Box.

Justophot

c. 1930

Meter Type:
Extinction.

Calibration:
Film speed: 10.12 - 28.3 Scheiner, Slow, Rapid, PAR, Super, Extra. Shutter speed: 1/1500 - 30m. Aperture: f1 - f45.3.

Attributes:
Filter factor. Eyesight setting. Finder shows figures of 1/25, 1/5, 8s, 2m.

Identification:
Chrome finish to body.

Serial Number:
224383 .

Justophot

Model 8

Meter Type:
Extinction.

Calibration:
Film speed: Autochrome, 0.4, 0.3, 0.2, Rapid, ER. Ultra Rapid, Extreme Rapid. Shutter speed: 1/1500 - 30m. Aperture: f1 - f45.2.

Attributes:
For long-sighted users, with eyesight setting. Filter factor. Finder shows figures of 1/25, 1/5, 4, 30s.

Identification:
Black body.

With:
Case.

Justophot

Model 1E

Meter Type:
Extinction.

Calibration:
Film speed: Autochrome, 0.4, 0.3, 0.2, Rapid, ER. Ultra Rapid, Extreme Rapid. Shutter speed: 1/1500 - 30m. Aperture: f1 - f45.2.

Attributes:
For long-sighted users, with eyesight setting. Filter factor. Finder shows figures of 1/25, 1/5, 8s, 2m.

Identification:
Black body.

Serial Number:
1480S .

With:
Instructions, Control coupon. Pouch. Box..

Cinephot

Drem

Vienna

Austria

Meter Type:
Extinction.

Calibration:
Frames per second: 8 - 128, shutter opening: 270 - 10. Aperture: f1 - f45.2.

Attributes:
Filter factor. Finder shows figures of 1/32, 4, 1/4, 30.

Identification:
Black body.

The Drem company was founded around 1924, the Justophot, designed by Dr. Emil Mayer, must have been one of the first products. A cine version was introduced about the same time. In use the tube is set to one of four values depending on the judged light level. The value corresponds to a shutter speed. When looking through the finder the value can be seen and by turning a ring, which controls an iris, the extinction point is set. The correct aperture is now shown opposite an index on the meter barrel. To find an alternative shutter speed or aperture a ring showing shutter speeds is also set against the index. The settings are for 'normal' emulsions, for other speeds a third ring is set against the shutter speed and gives a new shutter speed.

Early models have black painted bodies and a round eye-shade to the finder. Later the tube length was increased slightly and a contoured eye-shade fitted. In 1928 the sensitivity was increased. In c. 1930 a chrome finish to the body was used and the tubes were slightly shorter. In 1933 the operation was improved by setting the plate speed when first using the meter, the setting remained in effect for subsequent readings. An improved model of the Cinephot was introduced in 1928. The calibration of the plate speed ring varies. At some point models were produced for long or short sight. Model designations vary but at one time the model for normal and short sight was called Model I and for normal to long sight Model II. An E suffix denoted that the aperture scale was for England.

References & Notes:
BP 214939/1924. BJA 1926, pp. 240, 756. BJA 1927, p.359. BJA 1928, p. 163. BJA 1929, pp. 333, 691. BJA 1931, p. 657. BJA 1934, pp. 134, 301. Phot. Journal 9/1928, p. v.


Company Details:

Drem

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


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