Title:
FILM UNIT WITH LIGHT EMISSION DEVICE BUILT-IN LENS
Document Type and Number:
Japanese Patent JP2002258446
Kind Code:
A
Abstract:
To provide a film unit with a light emission device built-in lens in, which a photographed background does not become darker in photography using auxiliary light, specially, in a wide room, etc.
Conditions of 1.08≤f/L≤1.20, 5≤F≤8, 1/150≤T≤1/60, and 6.2≤A≤7.9 are satisfied, where (f) is the coal length (mm) of a photographic lens, L is the length (mm) of the short side of a photographic picture plane, F is the stop when a built-in light emission device is used, T is the shutter speed (ms) when the light emission device is used, and A is the reference exposure quantity (EV) when the light emission device is used.
Inventors:
KOBAYASHI HIROYUKI
Application Number:
JP2001052034A
Publication Date:
September 11, 2002
Filing Date:
February 27, 2001
Export Citation:
Assignee:
KONISHIROKU PHOTO IND
International Classes:
G03B7/085; G03B7/16; G03B7/17; G03B7/18; G03B9/02; G03B9/06; G03B9/07; G03B11/00; G03B15/03; G03B15/05; G03B17/04; G03B17/12; G03C3/00; (IPC1-7): G03C3/00; G03B7/085; G03B7/16; G03B7/18; G03B9/02; G03B9/06; G03B9/07; G03B11/00; G03B15/03; G03B15/05; G03B17/04; G03B17/12