GB887570A - Improvements in or relating to supplementary lens systems for twin-lens photographic cameras - Google Patents

Improvements in or relating to supplementary lens systems for twin-lens photographic cameras

Info

Publication number
GB887570A
GB887570A GB14756/58A GB1475658A GB887570A GB 887570 A GB887570 A GB 887570A GB 14756/58 A GB14756/58 A GB 14756/58A GB 1475658 A GB1475658 A GB 1475658A GB 887570 A GB887570 A GB 887570A
Authority
GB
United Kingdom
Prior art keywords
lens
objective
twin
attachment
mirror
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
GB14756/58A
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 GB887570A publication Critical patent/GB887570A/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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lenses (AREA)

Abstract

887,570. Supplementary lens attachment for twin lens photographic cameras. HEIDECKE, R., and FRANKE, H., [trading as FRANKE & HEIDECKE, FABRIK PHOTOGR PRAZISIONS-APPARATE.]. May 8, 1958 [July 13, 1957], No. 14756/58. Class 98(1). A supplementary lens system for attachment to a twin lens camera comprises a front lens 6 having an aperture of greater diameter than a rear aperture adapted to be located immediately in front of the taking objective 2, a pair of mirrors of which one is a partially transparent beam-splitting mirror 9 in the direct path to the taking objective 2 and the other mirror 10 is arranged to reflect the light beam reflected by the beam-splitting mirror in a direction parallel to the axis of the taking objective into the focusing and finder objective 3, and a negative lens e.g. at 11 in the path of the reflected light beam to compensate for the greater length of the reflected light path. Further similar lenses 7, 8 may be equally disposed about the semi-reflecting mirror 9. The attachment may be secured to the camera as by a bayonet joint including a rotatable ring engaging one of the objective mounts as at 13.
GB14756/58A 1957-07-13 1958-05-08 Improvements in or relating to supplementary lens systems for twin-lens photographic cameras Expired GB887570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE887570X 1957-07-13

Publications (1)

Publication Number Publication Date
GB887570A true GB887570A (en) 1962-01-17

Family

ID=6833863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14756/58A Expired GB887570A (en) 1957-07-13 1958-05-08 Improvements in or relating to supplementary lens systems for twin-lens photographic cameras

Country Status (1)

Country Link
GB (1) GB887570A (en)

Similar Documents

Publication Publication Date Title
GB1106108A (en) Improvements in or relating to optical measuring apparatus for spectacles
GB1436828A (en) Single lens reflex camera
GB1207113A (en) Improvements relating to photographic cameras
GB887570A (en) Improvements in or relating to supplementary lens systems for twin-lens photographic cameras
GB959284A (en) Improvements in and relating to view finders for photographic cameras
US2963950A (en) Twin lens reflex camera
GB915118A (en) Newton viewfinder for a photographic camera
GB1010226A (en) Improvements in or relating to photographic cameras
US2464166A (en) Split field range finder for cameras interconnected to camera lens
GB1225035A (en) Optical viewing systems
SU117027A1 (en) Panoramic Film Optical System
SE301912B (en)
JPS61296335A (en) Stereo photographing double-lens adapter in single-lens reflex camera
GB765782A (en) Improvements in or relating to twin-lens reflex photographic cameras
GB476147A (en) Improvements in telescopes
GB684292A (en) Improvements in or relating to optical aligning instruments
GB945946A (en) Improvements in or relating to photographic camera lens hoods
GB701396A (en) Improvements in or relating to optical systems
GB367641A (en) Improvements in apparatus for setting lenses in photographic cameras
JPS57196224A (en) Mirror driving device for single-lens reflex camera
GB424611A (en) Improvements in photographic cameras
GB846917A (en) Improvements in and relating to supplementary devices for photographic cameras
GB814104A (en) Improvements in or relating to range-finding binoculars
GB933769A (en) Range finder for photographic cameras
GB107213A (en) Improvements relating to Photographic Cameras.