Viewing system for reflex camera
US4047207A · kind A · utility
7Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1976 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Jan 13, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A viewfinder system for a single lens reflex camera where the field lens of the system is positionable in accordance with the distance of the objective lens exit pupil from the focal plane and eyepiece lenses are positionable in accordance with the field lens to maintain uniform viewfinder brightness without any essential change in image magnification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.