 However, the much smaller CdS-photoresistor improved the stylish look of the camera, the battery powered light-meter was more shock-resistant, and the "CdS technology" could be used as a selling point in advertising.The housing needed to be changed just slightly, since Waaske unknowingly had adopted the appearance of Rollei's twin-lens reflex cameras, by placing the exposure time and aperture controls to the right and to the left side of the lens.Nevertheless, Rollei's designer Ernst Moeckl revised the housing, and by changing the edge radius made the camera body even smaller.