CH79346A - Method and device for determining the exposure time in photographic recordings - Google Patents

Method and device for determining the exposure time in photographic recordings

Info

Publication number
CH79346A
CH79346A CH79346A CH79346DA CH79346A CH 79346 A CH79346 A CH 79346A CH 79346 A CH79346 A CH 79346A CH 79346D A CH79346D A CH 79346DA CH 79346 A CH79346 A CH 79346A
Authority
CH
Switzerland
Prior art keywords
determining
exposure time
photographic recordings
recordings
photographic
Prior art date
Application number
CH79346A
Other languages
German (de)
Inventor
Nicola Stefani
Original Assignee
Nicola Stefani
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nicola Stefani filed Critical Nicola Stefani
Publication of CH79346A publication Critical patent/CH79346A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/38—Photometry, e.g. photographic exposure meter using wholly visual means
    • G01J1/40—Photometry, e.g. photographic exposure meter using wholly visual means using limit or visibility or extinction effect

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Viewfinders (AREA)
CH79346A 1917-12-15 1917-12-15 Method and device for determining the exposure time in photographic recordings CH79346A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH79346T 1917-12-15

Publications (1)

Publication Number Publication Date
CH79346A true CH79346A (en) 1919-01-16

Family

ID=4332608

Family Applications (1)

Application Number Title Priority Date Filing Date
CH79346A CH79346A (en) 1917-12-15 1917-12-15 Method and device for determining the exposure time in photographic recordings

Country Status (3)

Country Link
AT (1) AT83522B (en)
CH (1) CH79346A (en)
DE (1) DE312806C (en)

Also Published As

Publication number Publication date
DE312806C (en) 1919-06-10
AT83522B (en) 1921-04-11

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