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 Zero (film) Less Than Zero (film) Less Than Zero is a 1987 American drama film very loosely based on Bret Easton Ellis' novel of the same name. The film stars Andrew McCarthy as Clay, a college freshman returning home for Christmas to spend time with his ex-girlfriend Blair (Jami Gertz) and his friend Julian (Robert Downey Jr.), who is also a drug addict. The film presents a look at the culture of wealthy, decadent youth in Los Angeles. "Less Than Zero" received mixed reviews among critics. Ellis hated the film initially but his view of it later softened. He insists that the