US PATENT SUBCLASS 396 / 170
.~.~ Diaphragm function only

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

155  DF  WITH OBJECT ILLUMINATION FOR EXPOSURE {21}
166  DF  .~ Exposure control circuit with illumination mode {4}
170.~.~ Diaphragm function only

DEFINITION

Classification: 396/170

Diaphragm function only:

(under subclass 166) Subject matter in which the exposure control circuit adjusts an aperture value to control a diaphragm only.

(1) Note. Manual control circuit that has an illumination mode and that adjusts both exposure time value and aperture value is classified in subclass 166.

SEE OR SEARCH THIS CLASS, SUBCLASS:

242+, for program mode in generic exposure control circuit.

257+, for adjustment of diaphragm function only in generic exposure control circuit.