Photographic camera with exposure size corrected for position of exit pupil of taking lens

A variable-exposure-size camera comprising an aperture member which defines an aperture through which a photographic film positioned behind the aperture member is exposed to light passing through a taking lens and a mask means which is disposed between the aperture member and the taking lens and is driven by a mask drive means to change an effective edge of the aperture, thereby narrowing the effective opening area of the aperture, characterized by having an exposure size input means which is operated by a user of the camera and inputs the exposure size selected by the user, an exit pupil position detecting means which detects the position of the exit pupil of the taking lens and a controller which determines a position of the mask means where the actual exposure size conforms to the exposure size selected by the user responsive to the detection of the position of the exit pupil of the taking lens by said exit pupil position detecting means and which causes the mask drive means to move the mask means to the position determined, the mask drive means driving the mask means in directions that are simultaneously parallel to a plane of the photographic film and perpendicular to the length of the photographic film, both with a movement responsive to the exposure size input means and with a further movement responsive to the exit pupil position detecting means.