See also the discussion three weeks ago on hn: http://news.ycombinator.com/item?id=2596377 http://news.ycombinator.com/item?id=2596377 There is also an (unrela

See also the discussion three weeks ago on hn: http://news.ycombinator.com/item?id=2596377 http://news.ycombinator.com/item?id=2596377 There is also an (unrelated) iPhone App by the inventor for playing with depth of field: http://sites.google.com/site/marclevoy/ http://sites.google.com/site/marclevoy/