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
Many a true word is spoken in jest the editor of the collection Joseph Woodfall Ebsworth: "He goes a wooing, yet the matter's so,"<br> "He cares not much whether he speeds or no;"<br> "'Cause City Wives and Wenches are so common,"<br> "He thinks it hard to find an honest woman."<br> "Be n't angry with this fellow, I protest"<br> That many a true word hath been spoke in jest.<br> "By degrees he layes a wager, money's scant,"<br> "Until five shillings out; then ends his Rant." James Joyce combined this sentiment with the similar adage of "in vino veritas" to coin the phrase "in risu veritas" (in laughter, truth). Many