elongation
(1) loss of memory or irreversible change in the dimensions of a screen mesh that has been over-stressed; (2) the increase in length or width of a material produced by extending it to the point of rupture; ...
Lenses with a longer tube elongation added may allow shorter distances. Such elongations are usually reached with supplementary macro bellows or macro rings.
The EVF is a necessary consequence of the translucent mirror and the location of its phase-detection AF array, but apart from a slight elongation of the viewfinder housing it is hard to distinguish from an optical finder at a casual glance at the ...
If you’ve ever seen shots that depict intentional elongation of a subject’s nose, it was made with an ultra wide angle. The effect can be funny, but not pleasing for serious portraiture.
When you go to line up the frames, you'll end up with elongations and/or compressions that just won't look quite right, and that adds up to more time in front of the computer or a bigger retouching bill.
camera angles, lighting techniques, lens lengths (yes, I know there’s a 2:1 factor reduction, but I’m referring not to the numbers in mm’s but rather to the principles of lens compression and/or distortion and elongation).
 See also: Photograph, Image, Camera, Frame, Film
  
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