Watch Type - Antique and Vintage Cameras

The Watch

c. 1894

R. Field & Co.

Birmingham

England

Image of The Watch

Meter Type:
Actinometer.

Calibration:
Plate speed: 1 - 400 Watkins. Shutter speed: 1 - 400 (1/1000 - 400/1000). Aperture: f8 - f90.

Attributes:
Actinometer value: 2 - 150.

This meter uses coiled sensitive paper rather than circular paper as in the Bee. In use the actinometer value is taken. The aperture is matched against the plate speed, the exposure time can then be read against the actinometer value.

References & Notes:
BP 25000/1894. BJA 1898, p. 367.

Watkins Actinometer

1899

R. Field & Co.

Birmingham

England

Meter Type:
Actinometer.

Calibration:
Aperture: f6 - f64, - 64 Watkins D numbers.

The patent of 1898 shows a similar but more complicated meter, that model is also shown in advertisements in 1900 - 1901. The patent does though mention a simplified form which describes this example. The actinometer value is taken in the usual way. The rear of the meter case carries a conversion scale of f numbers to Watkins D numbers. An equation stamped on the case - D/P x A = E shows how to calculate the exposure.

References & Notes:
BP 26281/1898. BJA 1900, pp. 409, 901. BJP 5/5/1899, p. 285.

Dial Meter

1900

Watkins Meter Co.

Hereford

England

Image of Dial Meter

Meter Type:
Actinometer.

Calibration:
Plate speed: 11 - 500 Watkins. Shutter speed: 1/500 - 1800s. Aperture: f5.6 - f45.

Attributes:
Actinometer value: 1 - 180.

With:
Short instructions. Spare papers. Tin box.

In use the plate speed is set in a window, the aperture is set in another window. The light is measured on the actinometer paper, this value is set on a dial, the exposure time is then shown in a fourth window. The Dial replaced earlier watch type meters and was itself replaced by the Bee in 1902. The price was 8/6.

References & Notes:
BP 19331/1900. BJA 1902, pp. 971, 1311. YBP 1901, p. 196. BJA 1900, p. 901 (similar model).


Company Details:

Watkins Meter Co.

Actinometers

Stanley Actinometer

Watkins

Standard, Junior

Watch Type
Dial Meter

Bee

Queen Bee

Autochrome, Colour, Indoor
Studio, Snipe

Focal Plane, Fall, Snapshot
Kinematograph, Small Cine
Filmo

Wynne

Infallible, Snapshot

Silver Infallible, Silver Gem

Hunter Meter

Other

Adams Meters

Imperial Exposure Meter

Le Chronopose Exact
Haka Expometer
Universal

Chronoscope PAP


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