Here's a pair of blog posts explaining the math behind the "Rolling Shutter Effect": Playing Detective with Rolling Shutter Photos and Rolling Shutters.
Photographer Mariana Cook has a new book of portraits of well-known mathematicians. Here's a slideshow with some interesting audio, and more of the photographs.
Pioneering electronic artist Ben Laposky began creating his “Oscillons” – abstract artworks created by photographing Lissajous figures off a cathode-ray oscilloscope – in the early 1950’s. Some consider him the father of computer art, and the beauty and clarity of his work is astonishing.
A very well designed site on the Analemma. Don't be scared off by the math, as there are excellent diagrams and quicktime movies on this difficult to visualize phenomena. Difficult, but not impossible, to photograph (probably less than 10 photos are in existence) Ulrich Bienert came close, and has a gallery and some tips if you're so inclined.