Nebro - Antique and Vintage Cameras

Nebro Exposure Calculator

Late 1940s

Neville Brown & Co. Ltd

London

England

Image of Nebro Exposure Calculator

Meter Type:
Calculator.

Calibration:
Film speed: 165 - 5000 H&D, 3 - 100 Weston, 21 - 34° European Scheiner, B - F Ilford. Shutter speed: 1/1000 - 64s, cine setting. Aperture: f1.5 - f32.

Attributes:
Settings for - Time of day, time of year. Sky condition. Subject. Filter factor. For Western hemisphere.

Notes:
The meter is stamped Hill Smith. 77 Bridge St. Warrington.

In use an index for the time of year is set against the type of film in use. The time of day is set against an index which incorporates filter factor settings. The type of subject is then set against the sky condition. The shutter speed and aperture pairs can then be read.

References & Notes:
BJA 1949, p. 499.

Fotogram

Concentric Indicator Laboratories

London

England

Meter Type:
Calculator.

Calibration:
Film speed: 16 - 34° Scheiner, 100 - 5000 H&D. Shutter speed: 1/1000 - 100s. Aperture: f1.2 - f36.

Attributes:
Settings for - Time of day, time of year. Sky conditions. Type of subject. Subject distance. For latitude 45° - 65° North.

Notes:
Address on cover: Concentric Indicator Laboratories. 36 Bourbon St. Mayfair. W1. Address on instructions: Branded Sales Ltd. 116 Buckingham Avenue. Slough.

With:
Instructions. Cardboard cover.

Light curves are drawn for different months of the year. To use, a pointer is set to the environment (subject and sky condition). A subject number is read in a window, six numbers are shown for different subject distances. A cursor is set to the appropriate subject number which are printed on the edge of the meter. The meter is then turned over and a dial moved so that the month curve intersects the cursor which carries a time of day scale. An inner disc carrying the film speed is moved to the sky condition. The shutter speed and aperture pairs can then be read. The price was 10/6.

References & Notes:
BJA 1949, p. 499.

Pathéscope Exposure Indicator

Pathéscope Ltd

London

England

Meter Type:
Calculator.

Calibration:
f1.5 - f22.

Attributes:
Settings for - Time of day, time of year. Weather. Subject.

Focal Lighting Chart

Focal Press

London

England

Meter Type:
Calculator.

Calibration:
Film speed: 26, 29, 32° Scheiner; 24, 40, 80 Weston. Shutter speed: 1/2000 - 4m. Aperture: f1.4 - f18.

Attributes:
Table to combine strength of light (watts) and distance to give 'Focal Light Units', that value is set on the calculator together with the subject and film speed to give the exposure time and aperture. Several instruction pages on the best place to position lamps.

Tables & Calculators

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Dibdin's Automatic
Lambert & Cadett's
W. Tylar

Ilford Meter

Imperial Exposure Reckoner

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Voigtländer, Agfa, Lindner

Imperial, Ilford
Dufay, Kodak

Wellington Exposure Disc
Cheape, Posometer
Exposure Records

Posographe

Wellcome Calculator

Nebro, Fotogram
Pathéscope, Lighting Guide

Johnson's


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