Apparatus for varying picture size before or after film advance

Device for use in making photographic exposures on a strip-shaped light-sensitive material comprising a housing having a light-path opening, a picture area limiting frame enclosing the light-path opening, means for guiding the strip-shaped light-sensitive material behind the picture area limiting the frame and the light-path opening, a transport arrangement for the forward transport of the strip-shaped material in steps in its longitudinal direction, at least one adjustable mask for covering portions of the light-path opening thereby forming a picture window smaller than the picture area limiting frame, the portions of the light-path opening which can be covered by the mask adjoining opposite edges of the light-path opening that are at right angles to the longitudinal direction of the strip-shaped material so that a first edge of the picture window as well as a second edge of the picture window as seen in reference to the forward transport direction of the strip-shaped material are alterable in position by displacement of the mask, control means for the automatic limitation of the steps of forward transport caused by the transport arrangement of the strip-shaped material in adaptation to the size of the picture window defined by the mask, means for selecting a desired picture window and unidirectional linking means interconnected between the means for selecting the picture window and the transport arrangement for the strip-shaped material such that each adjustment of the means for selecting the picture window, which calls for a position change of the second edge of the picture window in the forward transport direction of the strip-shaped material automatically produces a a forward correction transport of the strip-shaped material at least equal to said position change.