Corfield - Antique and Vintage Cameras

Corfield

1950

K.G. Corfield

Wolverhampton

England

Image of Corfield

Meter Type:
Extinction.

Calibration:
Film speed: 10 - 40 BSI. Shutter speed: 1/2000 - 60m. Aperture: f1 - f32.

This is a very heavy meter made of metal finished in black crackle paint. In use the finder focuses on a screen having on it a dot formation, half of the field remains brighter than the other to prevent false readings due to eye compensation. The meter knob is turned, which rotates a variable density wedge, until the dots on the darker half of the field merge with the background. The density wedge is made of two pieces of photographic film.

References & Notes:
BJA 1951, pp. 206, 563.

Nebro Visual

Neville Brown & Co. Ltd

London

England

Meter Type:
Extinction.

Calibration:
Film speed: C - G Ilford, 12 - 200 Weston, 24 - 36 Scheiner, 16 - 250 British BS, 16 - 250 ASA. Shutter speed: 1/1000 - 32m. Aperture: f2 - f32.

Attributes:
Filter factor.

Nebro Visual

Meter Type:
Extinction.

Calibration:
Film speed: C - G Ilford, 12 - 200 Weston, 23 - 35 Scheiner, 13 - 25 DIN, 400 - 6400 H&D. Shutter speed: 1/1000 - 32m. Aperture: f2 - f32.

Attributes:
Filter factor.

With:
Instructions. Box.

In use the calculator is set to show the film speed. The exposure number (least distinguishable in finder) is set against the weather condition. The shutter speed and aperture pairs can then be read. A note in the instruction book says the meter was planned in 1940 and that in 1945 sample models were produced.

References & Notes:
AP 6/6/1956, p. 50. BJA 1949, pp. 187, 498.

Ludac II

1950s

Lumley Davis & Co. Ltd

London

England

Meter Type:
Extinction.

Calibration:
Film speed: 23 - 32 Scheiner. Shutter speed: 1/400 - 1. Aperture: f1.4 - f32.

Attributes:
The finder shows a set of characters. Weather conditions of: bright sun, hazy sun, cloudy bright, cloudy dull.

With:
Instructions. Box.

In use the least distinct letter in the finder is set against the film speed. Adjustment is made for the weather conditions. The shutter speed and aperture pairs can then be read.


Company Details:

Corfield

Extinction

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Le Photometre Normal

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Corfield
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