> Yes Adam, but convergence gives slightly* different perspective to the > two images.. that's the effect that puzzles me most. > > > *not so slightly when macroing, of course It may be interesting to consider the case of looking with eyes diverging as well. Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist