Apparatus for retarding camera shutter release

摘要

An electro-mechanical shutter release delay apparatus includes a front curtain lock lever 4 sharing a common pivot axis 6 with a release lever 5 and joined to the latter by a spring 7. The depression of a shutter release rod 8 initially rotates the release lever 5 to close a first switch S1 which energizes front and rear curtain holding magnets M1 and M2. Continued depression tensions the spring and eventually closes a second switch S2. The latter energizes a flood lamp and initiates a time delay circuit, whose output deenergizes the front curtain holding magnet. The spring then rotates the lock lever to release the front curtain and commence the exposure, by which time the lamp has reached maximum intensity. After the proper exposure time has elapsed the rear curtain holding magnet is deenergized to release the rear curtain and terminate the exposure.