FR432663A - Improvements in the mode and means employed to mechanically focus photographic lenses - Google Patents

Improvements in the mode and means employed to mechanically focus photographic lenses

Info

Publication number
FR432663A
FR432663A FR432663DA FR432663A FR 432663 A FR432663 A FR 432663A FR 432663D A FR432663D A FR 432663DA FR 432663 A FR432663 A FR 432663A
Authority
FR
France
Prior art keywords
mode
means employed
photographic lenses
focus photographic
mechanically focus
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
Other languages
French (fr)
Inventor
Lodewyk Jan Rutger Holst
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR432663A publication Critical patent/FR432663A/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
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/34—Means for automatic focusing therefor
    • G03B27/36—Means for automatic focusing therefor by mechanical connections, e.g. by cam, by linkage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR432663D 1911-07-26 1911-07-26 Improvements in the mode and means employed to mechanically focus photographic lenses Expired FR432663A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR432663T 1911-07-26

Publications (1)

Publication Number Publication Date
FR432663A true FR432663A (en) 1911-12-12

Family

ID=1474724

Family Applications (1)

Application Number Title Priority Date Filing Date
FR432663D Expired FR432663A (en) 1911-07-26 1911-07-26 Improvements in the mode and means employed to mechanically focus photographic lenses

Country Status (1)

Country Link
FR (1) FR432663A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012819B (en) * 1952-04-21 1957-07-25 Hans Ado Brandt Photographic enlarger with forced focusing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012819B (en) * 1952-04-21 1957-07-25 Hans Ado Brandt Photographic enlarger with forced focusing

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