Wellcome Calculator - Antique and Vintage Cameras

Photographic Exposure Record and Diary

For 1901

Burroughs Wellcome & Co.

England

Image of Photographic Exposure Record and Diary

Meter Type:
Tables.

The 1901 issue was a diary and note book with exposure tables, the calculator included in later editions was not present.

Attributes:
Tables of exposure settings based on latitude, month, time of day, sky conditions, subject and plate speed.

Photographic Exposure Calculator, Handbook and Diary

For 1931

Burroughs Wellcome & Co.

England

Image of Photographic Exposure Calculator, Handbook and Diary

Meter Type:
Calculator.

Calibration:
Plate speed factor: 1/32 - 4. Shutter speed: 1/800 - 64s. Aperture: f3 - f32 and US 1 - 64.

Attributes:
Settings for - Month. Subject. For Northern hemisphere.

With:
Separate sheet of development information.

For 1935

Meter Type:
Calculator.

Calibration:
Plate speed factor: 1/32 - 4. Shutter speed: 1/800 - 64s. Aperture: f3 - f32 and US 1 - 64.

Attributes:
Settings for - Month. Subject. For Northern hemisphere.

With:
Pencil.

For 1936

Meter Type:
Calculator.

Calibration:
Plate speed factor: 1/64 - 4. Shutter speed: 1/800 - 64s. Aperture: f3 - f32 and US 1 - 64.

Attributes:
Settings for - Month. Subject. For Northern hemisphere.

With:
Pencil.

Photographic Exposure Guide

War Emergency Edition

c. 1942

Meter Type:
Calculator.

Calibration:
Plate speed factor: 1/128 - 3. Shutter speed: 1/1200 - 64s. Aperture: f1.2 - f16 and US 1 - 16.

Attributes:
Settings for - Month. Subject.

For 1946

Meter Type:
Calculator.

Calibration:
Plate speed factor: 1/256 - 3. Shutter speed: 1/1200 - 64s. Aperture: f1.8 - f16 and US 1 - 16.

Attributes:
Settings for - Month. Subject.

Identification:
Post war edition with red covers.

This is a disc type calculator incorporated into a diary that also contains a note book, exposure records and tables of information. The diary, with exposure tables, first appeared in 1900, the calculator was introduced in 1903. Various names were used:

  • Wellcome's Photographic Diary and Exposure Record. 1900
  • Wellcome's Photographic Exposure Record and Diary. 1901 - 1909
  • Wellcome Photographic Exposure Record and Diary. Until c. 1921
  • Wellcome Photographic Exposure Calculator, Handbook and Diary. c. 1922 - c. 1941
  • Wellcome Photographic Exposure Guide. c. 1942 - 1946
  • Wellcome Photographic Year Book. 1947 - 1948
Until 1903 the diary was in the form of a book, from 1903 the familiar wallet style was introduced, early editions were also available bound in leather, usually red. The wallet style, having end flaps that closed up around the book, remained until c. 1941. Due to paper shortages a war time issue was produced, this was a slim book without the diary and much other information. The book form continued in expanded form after the war. From 1947 the calculator was included in the 'Wellcome Photographic Year Book', in 1949 this became the 'Johnson Wellcome Photographic Year Book' when Johnsons became the agents for Wellcome products. Different editions for different parts of the world were produced (Northern hemisphere, Southern hemisphere, intr. 1901, USA, intr. 1907), these usually had covers of different colours, red being for the USA, blue for the southern hemisphere.

References & Notes:
Phot. Dealer Dec/1902, p. 310. BJA 1922, p. 581. BJA 1932, p. 313. BJA 1933, p. 493. BJA 1944, p. 163. BJA 1946, p. 191. BJA 1947, p. 180. Johnsons Photographic Year Book 1956, p. 68.

Johnson Photographic Year Book

1956

Johnson & Sons Ltd

London

England

Meter Type:
Calculator.

Calibration:
Plate speed: 17 - 35 BS. Shutter speed: 1/500 - 15s. Aperture: f2.8 - f22.

Attributes:
Settings for - Latitude, time of day, time of year, weather conditions, these combine to give a light value. Subject.

Johnsons became agents for Wellcome photographic products in 1948. From 1949 they issued the 'Johnson Wellcome Photographic Year Book'. From around 1952 the name of Wellcome was dropped from the title. The film speed scale was changed from Wellcome numbers to BS around the time that Johnsons took over the diary.

References & Notes:
BJA 1949, p. 40. BJA 1951, p. 53. BJA 1952, p. 54.

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