GB424611A - Improvements in photographic cameras - Google Patents

Improvements in photographic cameras

Info

Publication number
GB424611A
GB424611A GB23997/34A GB2399734A GB424611A GB 424611 A GB424611 A GB 424611A GB 23997/34 A GB23997/34 A GB 23997/34A GB 2399734 A GB2399734 A GB 2399734A GB 424611 A GB424611 A GB 424611A
Authority
GB
United Kingdom
Prior art keywords
view finder
objective
chamber
prism
rays
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
GB23997/34A
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
Publication of GB424611A publication Critical patent/GB424611A/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
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/18—Focusing aids
    • G03B13/20—Rangefinders coupled with focusing arrangements, e.g. adjustment of rangefinder automatically focusing camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Studio Devices (AREA)

Abstract

424,611. Photographic cameras. FRANKE, P., 32c, Wolfenbuttlerstrasse, and HEIDECKE, R., 7, Seesenerstrasse, both in Brunswick, Germany. Aug. 20, 1934, No. 23997. Convention date, Sept. 1, 1933. [Class 98 (i)] In a camera in which there is a view finder chamber above the exposure chamber and in which the view finder objective and the main objective are connected to each other for simultaneous focusing adjustment, a fixed system of lenses is associated with the view finder objective. If a reflecting mirror b is employed in the view finder chamber a, a positive lens d is used to reduce the length of the pencil of rays from the objective c to the screen f. If a dihedral mirror or prism is used, a negative lens is mounted behind the view finder objective to lengthen the path of the rays and enable the dihedral mirror or prism to be unmutilated. Specification 407,552 is referred to.
GB23997/34A 1933-09-01 1934-08-20 Improvements in photographic cameras Expired GB424611A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE424611X 1933-09-01

Publications (1)

Publication Number Publication Date
GB424611A true GB424611A (en) 1935-02-25

Family

ID=6476929

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23997/34A Expired GB424611A (en) 1933-09-01 1934-08-20 Improvements in photographic cameras

Country Status (1)

Country Link
GB (1) GB424611A (en)

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