Replaceable finder system for single-lens reflex camera
US4132472A · kind A · utility
6Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An SLR camera having a replaceable penta-prism 6 slidably inserted from the rear face of the camera via mating flange rails 13a on the finder body and recessed grooves 8a in the camera body, a replaceable focal plate or screen 3 removably mounted in a pivotal holding plate 11 accessible through the lens mount 9, and a meter display system extending into the viewing frame of the finder and interposed between the penta-prism and the focal plate. The display system may include a shutter speed scale 15 and an overlying manual speed pointer 16 readable from the lens light, and an inset LED array 17 for indicating the meter reading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.