Interchangeable lens system
US5257058A · kind A · utility
26Cited by
1References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1993 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Jan 21, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An interchangeable lens system comprising a lens unit; a camera body provided with a first electric power supplying battery; a conversion adapter for connecting the camera body with the lens unit, thereby enabling electric power supply from the battery in the camera body to the lens unit; a second electric power supplying battery connected to the conversion adapter and controllable independently from the first battery; and a control circuit for enabling electric power supply from the second battery to the lens unit only when the camera body is connected to the conversion adapter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.