Lens-fitted photo film unit and assembling method for the same
US6449430B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Nov 18, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2219/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens-fitted photo film unit is pre-loaded with photo film. First and second taking lenses are arranged in an arranging direction crosswise to a photographic optical axis, and have focal lengths different from each other. A rotatable lens holder supports the first and second taking lenses. An externally operable button member is operable by external operation, rotates the lens holder in the arranging direction, and sets the first and second taking lenses selectively on the photographic optical axis. A viewfinder optical system is settable at first and second viewfinder magnifications, and adapted to observation of a photographic field. A magnification changer mechanism including a lever is shifted in response to rotation of the lens holder, and sets the viewfinder optical system at the first and second viewfinder magnifications respectively when the first and second taking lenses are set on the photographic optical axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.