With lomography and Fukkatsu now selling new pocket film again, if you want something really small maybe you should get a 110 camera. Many were quite sophisticated. Fujica and Minolta both made them with zoom lenses and many others including Kodak, Canon and Vivitar models incorporated a switchable normal/zoom lens. But the Cadillac was really the Pentax auto 110 which was like a tiny SLR with interchangable lenses. Lots of good info here: http://subclub.org/shop/110.htm