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
Backstreet Boys: Larger Than Life McLean confirmed the deal, telling "Us Weekly" that the residency would begin in January 2017. On September 23, the Backstreet Boys confirmed their Vegas residency happening in 2017 titled Backstreet Boys: Larger Than Life. According to KVVU-TV's report, "Backstreet Boys: Larger Than Life" is the fastest-selling residency in Las Vegas in history. It is also the first time that Planet Hollywood has opened up balcony seats for headliner, making the theater 2000 seats bigger than fellow headliner Jennifer Lopez and Britney Spears. Its first round with 9 shows had grossed total revenue of $5,399,176 with 4,667 average audiences per show,