At the risk of invalidating this thought experiment with prosaic practicality,if "stranded on an island," survival would be my primary concern. The choice of body is irrelevant, but for the lens, I'd want theEF 1200mm f/5.6 L USM Lens - it's got the largest-diameter front element of any Canon lens, which would be useful to signal passing rescue aircraft, and it's 3' length and 36 pound weight would make a useful club to fend off inimical wildlife such as polar bears or Komodo dragons.


[:P]