Interchangeable finder device
US4401374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1981 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Sep 4, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An interchangeable finder device of a single lens reflex camera has a finder optical system in which a focusing screen, a pentaprism and an eyepiece are fixed in a predetermined positional relation, a casing containing the optical system therein, and a mounting-dismounting device provided on the casing to mount the casing to the camera body. The finder device further has a sliding mechanism for supporting the finder optical system slidably in a direction perpendicular to the focus surface of the focusing screen relative to the mounting-dismounting mechanism so that the finder optical system can move in said perpendicular direction independently of the mounting-dismounting device when the casing is mounted to the camera body by means of the mounting-dismounting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.