GB1213244A - Photographic cameras - Google Patents

Photographic cameras

Info

Publication number
GB1213244A
GB1213244A GB52394/68A GB5239468A GB1213244A GB 1213244 A GB1213244 A GB 1213244A GB 52394/68 A GB52394/68 A GB 52394/68A GB 5239468 A GB5239468 A GB 5239468A GB 1213244 A GB1213244 A GB 1213244A
Authority
GB
United Kingdom
Prior art keywords
flash
meter
camera
thyratron
contacts
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB52394/68A
Inventor
Walter Hennig
Heinz Schulze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentacon GmbH Foto und Feinwerktechnik
Original Assignee
Pentacon Dresden VEB
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 Pentacon Dresden VEB filed Critical Pentacon Dresden VEB
Priority to GB52394/68A priority Critical patent/GB1213244A/en
Publication of GB1213244A publication Critical patent/GB1213244A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)
  • Stroboscope Apparatuses (AREA)

Abstract

1,213,244. Photographic cameras. PENTACON DRESDEN KAMERA-UNDKINOWERKE VEB. Nov.5, 1968, No.52394/68. Heading G2A. [Also in Division G1] A photographic camera having a photo-cell 4 receiving light through the camera lens is provided with a built in photometer 2 and with a quantitative light meter 3, which may or may not be in the camera housing 1, there being a changeover switch 5 for alternatively connecting the photometer or the meter 3 to the photo-cell 4, as desired. As illustrated, the light meter 3 is built in, and is connected through a thyratron 6 with connecting contacts 7 on the camera housing, into which contacts a flash apparatus 13 is plugged. A switch 20 is operated by the camera shutter mechanism to ignite the flash-bulbs 12 in the apparatus 13. When a condenser 19 of the meter 3 has been sufficiently charged, the thyratron 6 is ignited to act as a switching element thereby cutting off the operating voltage to the bulb 12. In another embodiment Fig. 2 (not shown), the light meter (3) is mounted in an adaptor (15) which is connected to the changeover switch (5) by plug contacts (16) and conductors (17). The thyratron (6) is connected to the flash apparatus (13) by conductors (9) which plug into the adaptor, and the flash-bulb is controlled as described above. In a third embodiment Fig. 3 (not shown), the light meter (3) is mounted in the flash apparatus (13), which apparatus is connected to the switch (5) by the plug contacts (16) and is controlled as described above.
GB52394/68A 1968-11-05 1968-11-05 Photographic cameras Expired GB1213244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB52394/68A GB1213244A (en) 1968-11-05 1968-11-05 Photographic cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB52394/68A GB1213244A (en) 1968-11-05 1968-11-05 Photographic cameras

Publications (1)

Publication Number Publication Date
GB1213244A true GB1213244A (en) 1970-11-25

Family

ID=10463762

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52394/68A Expired GB1213244A (en) 1968-11-05 1968-11-05 Photographic cameras

Country Status (1)

Country Link
GB (1) GB1213244A (en)

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PE20 Patent expired after termination of 20 years