Viewfinder mask for a photographic camera, viewfinder, and camera
US5933667A · kind A · utility
1Cited by
2References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 22, 1998 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Jul 22, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B13/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A viewfinder mask, viewfinder and photographic camera. The viewfinder mask connects to a camera lens for adjusting the image field of the viewfinder to the adjustable focal length of the camera lens. The viewfinder mask comprises an L-shaped frame part and a rectangular frame part covering the latter, these being linked by a film hinge. A guide lever engages on the one hand a corner of the rectangular frame part and on the other hand, in the area of the film hinge, the L-shaped frame part. The frame parts are mounted movably in relation to one another inside the case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.