Lens fitted film package
US4961085A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1989 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Jul 17, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2219/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens-fitted film package comprising a light-tight case having at least a taking lens attached to a front wall thereof and a roll of film contained therein and a lens holder attached to the light-tight case. The lens holder is formed with a conversion lens holding opening for holding a conversion lens therein and a view-defining opening for defining the field of view of a viewfinder formed in the light-tight case. The lens holder is slidably moved with respect to the light-tight case so as to position the lens holder at a distance from the front wall of the light-tight case wherein the conversion lens changes the effective focal length of the taking lens and the view-defining opening defines the field of view of the viewfinder suitably for the effective focal length of the taking lens thus changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.