 The cartridge sits in the right side of the camera and correspondingly the exposures lay "upside down" on the film, reflected by the inverted position of the film inscriptions (type, frame numbers) of under/over landscape pictures.To change the film, the back must be slid downwards and removed fully, like on the Contax, for example.For the shutter-coupled exposure meter of the prototype camera, Waaske selected a selenium cell powered meter from .