Lens-equipped film unit
US6456786B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Oct 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens-equipped film unit comprises a photographing mechanism including a photographic lens, a shutter of a fixed speed, an aperture and a strobe, and an unexposed photographic film has being charged therein. The photographing mechanism satisfying the relationship:7.0≦log2(G2)+log2(1/T)≦12.5,wherein T represents shutter speed (sec) of the shutter and G represents guide number (ISO 100.m) of the strobe. The film unit further comprises a photometer to measure a subject light quantity and to output light quantity signal corresponding to the subject light quantity, and an exposure quantity controller toward the charged photographic film in accordance with the light quantity signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.