Abstract: A camera shutter control device includesA light intensity to electric signal conversion means, which means further includes a first photosensitive means and a second and a third photosensitive means. The first means and the second and third means are designed in such a manner that they receive the light beams coming from a substantially different part of the object to be photographed and give electrical signals corresponding to the light quantity received.A memory means is included, which is electrically connected with the first and second conversion means and serves to memorize the difference between the signal outputs of both conversion means.