GB783607A - A diaphragm for a photometer, especially a photo-electric exposure meter - Google Patents

A diaphragm for a photometer, especially a photo-electric exposure meter

Info

Publication number
GB783607A
GB783607A GB176354A GB176354A GB783607A GB 783607 A GB783607 A GB 783607A GB 176354 A GB176354 A GB 176354A GB 176354 A GB176354 A GB 176354A GB 783607 A GB783607 A GB 783607A
Authority
GB
United Kingdom
Prior art keywords
aperture
plates
plate
area
diaphragm
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
GB176354A
Other languages
English (en)
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.)
Agfa Gevaert NV
Original Assignee
Agfa Camera Werk AG
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 Agfa Camera Werk AG filed Critical Agfa Camera Werk AG
Publication of GB783607A publication Critical patent/GB783607A/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
    • G03B7/04—Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device, e.g. by restoring point to a fixed associated reference mark
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Microscoopes, Condenser (AREA)
GB176354A 1953-05-21 1954-01-20 A diaphragm for a photometer, especially a photo-electric exposure meter Expired GB783607A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA18057A DE1008017B (de) 1953-05-21 1953-05-21 Blendenvorrichtung fuer Fotometer

Publications (1)

Publication Number Publication Date
GB783607A true GB783607A (en) 1957-09-25

Family

ID=6924056

Family Applications (1)

Application Number Title Priority Date Filing Date
GB176354A Expired GB783607A (en) 1953-05-21 1954-01-20 A diaphragm for a photometer, especially a photo-electric exposure meter

Country Status (7)

Country Link
AT (1) AT183976B (enExample)
CH (1) CH325521A (enExample)
DE (1) DE1008017B (enExample)
FR (1) FR1106713A (enExample)
GB (1) GB783607A (enExample)
IT (1) IT516249A (enExample)
NL (1) NL186314B (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111846954A (zh) * 2020-09-02 2020-10-30 钱丹 一种变距吸料机构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE610294C (de) * 1935-03-07 Gauthier Gmbh A Photographischer Objektivverschluss mit Belichtungsmesser
DE608427C (de) * 1935-01-23 Gauthier Gmbh A Objektivverschluss mit Belichtungsmesser
DE582033C (de) * 1929-06-09 1933-08-07 Gauthier Gmbh A Photographischer Objektivverschluss mit Belichtungsmesser
DE704313C (de) * 1935-09-01 1941-03-27 Metrawatt Akt Ges Lichtelektrischer Belichtungsmesser mit schwenkbarer Messbereichblende
DE702924C (de) * 1938-07-24 1941-02-25 Fritz Reich Dipl Ing Optischer Belichtungsmesser an photographischen Kameras
DE852653C (de) * 1949-09-24 1952-10-16 Egon Fischer Vorsatzgeraet fuer photographische oder kinematographische Kameras, vorzugsweise fuer solche mit Sucherobjektiv

Also Published As

Publication number Publication date
FR1106713A (fr) 1955-12-22
IT516249A (enExample)
NL186314B (nl)
DE1008017B (de) 1957-05-09
CH325521A (de) 1957-11-15
AT183976B (de) 1955-12-10

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