Exposure aiding device for an enlarger

Details Exposure aiding device for an enlarger Exposure aiding device for an enlarger

1982-07-12

1984-04-03

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

G03B 2770

Patent

active

044404891

ABSTRACT:
An exposure amount indicating arrangement for use with a photographic printing apparatus or the like, which includes an exposure amount setting section for setting values corresponding to desired printing exposure amount, an elapsed exposure amount output section for successively outputting values corresponding to elapsed exposure amount from starting of the printing, a calculating section for working out a ratio of the elapsed exposure amount to the set exposure amount, and an informing section for visually or acoustically indicating the ratio of the elapsed exposure amount to the set exposure amount, based on the value worked out by the calculating section.

REFERENCES:
patent: 2460443 (1949-02-01), Benton
patent: 3989374 (1976-11-01), Latka et al.
patent: 4025190 (1977-05-01), Hughes
"Photo Timer" from Electronics Today International, Sep. 1975.

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