Abstract: An interchangeable lens for cameras which can be modified so as to be able to be fitted to all types of cameras by only interchanging mount assemblies containing various different types of diaphragm operating means by using a lens barrel assembly containing a lens system and diaphragm blade means in common. In order to make the mass production and maintenance of high performances possible, this interchangeable lens includes a diaphragm operating lever which can be pivoted to the lens barrel assembly by a pin-hole connection and a diaphragm controlling cam ring and diaphragm correcting cam ring which can be rotatably held between the lens barrel assembly and mount assembly.

Abstract: A photographic camera capable of either automatically or manually taking-up the film comprising a rotary drive means such as a spring motor or an electric motor for automatic take-up of the film and a manual actuating means such as a lever or a knob for manual take-up of the film, these rotary drive means and manual actuating means being connected to opposite ends of the film take-up shaft through a first and second directional clutches having operational directions opposite to each other. This photographic camera further comprises a first and a second shutter release members so as to enable the camera to perform the double exposure photographing even when the camera is in a condition wherein the automatic take-up of the film is available.