Circuit arrangement for inputting film speed

摘要

The invention relates to a circuit arrangement for inputting the film speed into exposure measuring devices for photographic cameras. The aim and object of the invention is to match known measuring circuits to the most recent state of the art in inputting film speed by means of a circuit arrangement which allows inputting digital film speed codes into exposure measuring circuits which are such that the stop number is input as an analog electrical signal value. In accordance with the invention, a decoder circuit is provided whose input can be fed an item of digital information corresponding to the film speed, and in whose output there is a series of electrical switches (7-16), via which a voltage divider (17, 18) and therewith an analog signal corresponding to the film speed can be applied to the measuring circuit. <IMAGE>