Title:
ENLARGING LENS WITH STOP DOWN SCALE ILLUMINATING SYSTEM
Document Type and Number:
Japanese Patent JPS5445125
Kind Code:
A
Abstract:
An enlargement lens system has a light guide element positioned in the gap between the outer periphery of a rear lens group frame and a lens mount. A dispersion lens is provided on a portion of the rear lens and a transmission window is disposed on the rear lens frame. Light inside the effective area of the lens passes through the dispersion surface and the transmission window onto the light guide. The reflex surface on the guide reflects light onto the lens stop-value scale.
Inventors:
OOKURA ZENICHI
Application Number:
JP11139577A
Publication Date:
April 10, 1979
Filing Date:
September 16, 1977
Export Citation:
Assignee:
ASAHI OPTICAL CO LTD
International Classes:
G03B27/52; (IPC1-7): G03B27/32