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Examples are the sidewalk chalk drawings of Kurt Wenner and Julian Beever where the chalked image the pavement and the architectural surroundings all become part of an illusion. Art of this style can be produced by taking a photograph of an object or setting at a sharp oblique angle …

Even in View Cameras it is the size of the Lens’ Image Circle which is important to Shift not the angle of divergence of its peripheral rays – and the Tilt angle is relative to the optical axis (the angle of the lens’ focal plane is always perpendicular to its optical axis) so again a “Back AoV” just doesn’t come up.

Mon May 17 2004 14:30:00 GMT-0400 (Eastern Daylight Time) · (1) where the n i are any integers and a i are primitive vectors which lie in different directions (not necessarily mutually perpendicular) and span the lattice. The choice of primitive vectors for a given Bravais lattice is not unique. A fundamental aspect of any Bravais lattice is that for any choice of direction the lattice will appear exactly the same from each of the discrete lattice …

In geometry a solid angle (symbol: Ω) is a measure of the amount of the field of view from some particular point that a given object covers. That is it is a measure of how large the object appears to an observer looking from that point. The point from which the object is viewed is called the apex of the solid angle and the object is said to subtend its solid angle from that point.

1) Note that Equation (1) does not describe a traveling wave. At any position x y (x t) simply oscillates in time with an amplitude that varies in the x -direction as 2 y max sin (2 π x λ) {\displaystyle 2y_{\text{max}}\sin \left({2\pi x \over \lambda }\right)} . The animation at the beginnin…