Adaptor for providing a digital signal indicating the full open F number of an interchangeable photo-taking lens in a single lens reflex camera system
US4104649A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1976 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Nov 5, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device adapted for the purpose of enabling the use of presently available interchangeable photographic lenses in recently developed digitalized single lens reflex camera systems. This device is constructed in the form of an adaptor attachable to and detachable from the body of an interchangeable lens mount and capable, upon attachment to a conventional interchangeable lens, of providing information representing the full open F number of the interchangeable lens in the form of a coded digital signal. This signal is applied to a digitalized camera body associated therewith and provided, for example, with an inputting device adapted to receive the full open F number of the interchangeable lens as coded digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.