There is also an accessory exposure meter, the Panolux, for each range of cameras, which is partially coupled to the camera. The cameras allow manual control of the shutter speed and aperture. The lens in most of the cameras currently made (as at July 2012) is designated a Rotar T (a 29 mm f/4.5 in the 35 mm models, and a 50 mm f/4.5 in most of the 120-film cameras) however, cameras (such as that illustrated here) were previously made with lenses of the same specification and labelled as, Noblar T, or T. However, whereas in many panoramic cameras, the lens swings through little more than the angle required to cover the picture, the lens in the Noblex rotates through 360° the first part of the rotation serves to accelerate the lens so that its speed during the exposure is constant, giving even exposure across the frame. As in many panoramic cameras (such as the and ), the lens rotates during exposure to cover the wide format, and a slit behind the lens and travelling with it forms a focal-plane shutter.
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