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
While(1 Is Less Than 2) 3.5/5 stars. Rolling Stone, however, was more critical of the album stating "Deadmau5 has turned from an electro-house polymath into the world's most unnecessary Nine Inch Nails tribute act" giving it 2 stars out of 5. Slant Magazine was equally critical saying "Deadmau5 enters the fray with the advantage of deeply diminished expectations. His latest, While(1<2), comfortably clears the bar set by his contemporaries, and that would be impressive if the bar wasn't buried underground" also awarding it 2 stars. Note While(1 Is Less Than 2) While(1<2) (stylized as while(1<2); pronounced "while one is less than two") is the seventh