Konica Corporation

Kei Kaneiwa

Kazuhisa Aratame

Hiromi Nakanishi

Shuri Mizoguchi

Masami Fujita

Takao Hosaka

Kijiro Suzuki

Yuichi Atarashi

Toshifumi Iijima

Kiyoshi Yamashita

Hiroshi Kibayashi

Hideaki Haraga

Tetsufumi Takaba

Kiyoaki Hazama

Hiroshi Yamaguchi

Ken Ishida

Hideaki Ono

Mamoru Kawano

Jun Kitahara

Yoshichika Noda

Kijirou Suzuki

Single use camera with built-in electronic flash

A lens-fitted film unit including a main body; a photographic film, pre-loaded in the main body; an electronic flash unit; a shutter unit; a camera lens; and a diaphragm. In the lens-fitted film unit, a guide number of the electronic flash unit, a T-number determined from the camera lens and the diaphragm and a shutter speed of the shutter unit are determined so that A is not more than 8.5 when A represents an EV value of a reference exposure amount of the lens-fitted film unit under a stroboscopic photographing state minus 1.5; and intensity of a latent image, formed on the photographic film under the condition that a reference reflection panel being placed at a predetermined distance between 2-3 m from the lens-fitted film unit is illuminated by the electronic flash unit without other lights in the stroboscopic photographing state, corresponds to intensity of a latent image obtained under a photographing condition of photographing luminance not more than A&plus;5.0 in EV value.

Lens-fitted film unit with a built-in electronic flash unit and image forming method based on a photographic film exposed by the lens-fitted film unit with a built-in electronic flash unit

A strobe circuit for use in a lens-fitted film unit is composed of a metallic thin plate punched in a circuit pattern; and insulating plate materials covering both obverse and reverse surfaces of the metallinc thin plate; wherein a part of the metallic thin plate is used as a component of the strobe circuit.

Lens-fitted film unit

Growing community of inventors

Hino, Japan

Kei Kaneiwa