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
GB30360/38A
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz Wetzlar GmbH
Ernst Leitz GmbH
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 Ernst Leitz Wetzlar GmbH, Ernst Leitz GmbHfiledCriticalErnst Leitz Wetzlar GmbH
Publication of GB502787ApublicationCriticalpatent/GB502787A/en
G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B23/14—Viewfinders
Landscapes
Physics & Mathematics
(AREA)
Astronomy & Astrophysics
(AREA)
General Physics & Mathematics
(AREA)
Optics & Photonics
(AREA)
Viewfinders
(AREA)
Lenses
(AREA)
Abstract
502,787. Photographic view - finders. LEITZ GES., E. Oct. 20, 1938, No. 30360. Convention date, Dec. 30, 1937. [Classes 97 (i) and 98 (i)] A direct-vision view-finder has a convex eye lens L<1>, one or more concave object lenses L<2>, L<3> and an asymmetrical condensing lens L<4> on the. object side of the foremost object lens with its surface of greater curvature towards the observer. The system may be used in a finder of the kind having an image boundary frame as described in Specification 454,063. Data are given.
GB30360/38A1937-12-301938-10-20Improvements in or relating to photographic view finders
ExpiredGB502787A
(en)