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« on: February 25, 2013, 11:58:12 AM »
"FF does not fit in a package as small als the APS-C EOS M. But it does fit in a package as small as the Sony RX-1. I would be more than happy size-wise with the RX-1
36x24mm imaging surface will fit into really small boxes ... with some smart engineering. :-)"
FF does not fit in an RX-1, that's why it has a fixed lens. The lens includes the optical path for the light to get to the FF sensor. LEICA = smart engineering and their FF body is the size of the 6D minus the viewfinder.
Your examples prove what I am saying and you are not understanding. Fixed lenses to accommodate the approximately 35mm or 1.38" optical path minimum required between the FF sensor (35mm film) and the last lens element. Add packaging for the body case and electronics and you are at around 1.75-2.00 inches minimum for a FF. Film was easier, you could pretty much have the film slide along the back of the camera, not so with a sensor.