Ultra wide angle lens the difference is only whether distortion is present or not. However, the shorter the focal length, the more difficult it is to implement rectilinear correction. In fisheye lenses, the visual angle is close to or more than 180 degrees in at least one direction. For example, a "diagonal fish eye" would have a viewing angle of at least 180 degrees within the diagonals of the frame. A "circular fisheye" would represent the image in the form of a circle. Rectilinear ultra-wide angle lenses are used in photography and cinematography sometimes to achieve three-dimensional perspective distortion instead of simply two-dimensional barrel
Less Than Kin Vickers, to get back to the United States, decides to impersonate him. He is taken to the family group upon his arrival in New York City and soon finds himself possessed of the encumbrances and debts left by the former youth, which include a wife and three children. He is left a fortune, but discloses his identity and flees to Canada. En route he marries the ward of his benefactor, who had helped him escape and had hid in his automobile. Eventually he is cleared of all guilt and has a happy ending. Less Than Kin Less Than Kin is