Title:
CALCULATION SYSTEM FOR AUTOMATIC EXPOSURE CONTROL
Document Type and Number:
Japanese Patent JPS5253422
Kind Code:
A
Abstract:
PURPOSE: To perform a pertinent diaphragm setting of a convertible lens with various open F values by resolving an encoded diaphragm information Fv into an open F value information Fov and a diaphragm step value information f in order to calculate an exposure control.
Inventors:
NUMATA SABUROU
SHISHIKURA HIROHISA
SAGARA IWAO
SHISHIKURA HIROHISA
SAGARA IWAO
Application Number:
JP12910975A
Publication Date:
April 30, 1977
Filing Date:
October 27, 1975
Export Citation:
Assignee:
FUJI PHOTO OPTICAL CO LTD
OKI ELECTRIC IND CO LTD
OKI ELECTRIC IND CO LTD
International Classes:
G03B7/0805; G03B7/20; (IPC1-7): G03B7/08
Domestic Patent References:
| JPS5028831A | 1975-03-24 |