Calculator, exposure
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1995.1615.001
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- OBJECT TYPE
- MANUAL/COLOUR & CINE
- DATE
- 1950
- ARTIFACT NUMBER
- 1995.1615.001
- MANUFACTURER
- Unknown
- MODEL
- JOHNSON CALCULATOR
- LOCATION
- England
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- SYNTHETIC
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 8.2 cm
- Width
- 7.4 cm
- Height
- N/A
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Photography
- Category
- Cine camera accessories
- Sub-Category
- N/A
Manufacturer
- AKA
- Unknown
- Country
- England
- State/Province
- Unknown
- City
- Unknown
Context
- Country
- Canada
- State/Province
- Unknown
- Period
- Probably used in the late 1950s.
- Canada
-
Unknown - Function
-
A device used to calculate the correct camera lens opening for a proper exposure depending on light available. - Technical
-
One of a series of Johnson plastic disc type calculators for use in determining exposure under daylight condition for all types of still and cine colour reversal films. Weather conditions and seasonal variations in lighting are considered. The calculations were compiled in accordance with the British Standards exposure tables BS935 and applies to latitudes 45-degrees to 55-degrees north, but correct light value tables for other latitudes were supplied for pasting over the standard values. (Ref. 1) - Area Notes
-
Unknown
Details
- Markings
- PRINTING INCLUDES: 'JOHNSON COLOUR & CINE CALCULATOR/ FOR REVERSAL FILMS'/ [SEE IMAGE BANK FOR DETAILS]
- Missing
- N/A
- Finish
- CREAM WITH BLACK AND RED PRINTING
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Unknown Manufacturer, Calculator, exposure, after 1950, Artifact no. 1995.1615, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1995.1615.001/
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