So somebody's finally gone and done it.
Made a lens adaptor for the iPhone
Now, next time that perfect photo opportunity comes up the next time you just happen to have your Bigma in your coat pocket, but left the camera at home because it's too bulky
Seriously - world's most pointless invention. And for $250, leaving your aperture wide open (but losing several stops of light), and no autofocus.
Though with the crop factor you just may be able to spot Neil Armstrong's footprints on the moon.
That is, of course, if you believe NASA's lies