This lens is a super wide-angle lens of the so-called fisheye type with high speed and excellent image quality. With regard to its use in general photography, the focal length was chosen in such a way that the 35 mm format is fully utilized. Most important for general photography are, above all, the excellent image quality and the remarkable image field illumination at full aperture, i.e. when the incredibly high speed of this lens is fully utilized. This super wide-angle lens is well suited for panorama photography where distortion phenomena can be avoided by skilful camera work, for detail photography where space is extremely limited and for photographs for which the extreme wide-angle perspective or distortion are essential elements of the picture.