FR593798A - Perfectionnements aux appareils photographiques - Google Patents

Perfectionnements aux appareils photographiques

Info

Publication number
FR593798A
FR593798A FR593798DA FR593798A FR 593798 A FR593798 A FR 593798A FR 593798D A FR593798D A FR 593798DA FR 593798 A FR593798 A FR 593798A
Authority
FR
France
Prior art keywords
cameras
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
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.)
DUCHATELLIER
Original Assignee
DUCHATELLIER
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 DUCHATELLIER filed Critical DUCHATELLIER
Application granted granted Critical
Publication of FR593798A publication Critical patent/FR593798A/fr
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
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/18—Focusing aids
    • G03B13/24—Focusing screens
    • G03B13/26—Focusing screens with magnifiers for inspecting image formed on screen

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR593798D 1925-02-24 1925-02-24 Perfectionnements aux appareils photographiques Expired FR593798A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR593798T 1925-02-24

Publications (1)

Publication Number Publication Date
FR593798A true FR593798A (fr) 1925-08-31

Family

ID=8965723

Family Applications (1)

Application Number Title Priority Date Filing Date
FR593798D Expired FR593798A (fr) 1925-02-24 1925-02-24 Perfectionnements aux appareils photographiques

Country Status (1)

Country Link
FR (1) FR593798A (fr)

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