Upload & Sell: On
I think there is another reason for the"Zeiss look". It is the talent of the guys who shoot these lenses . For obvious reasons, when there are decent, good and even some great lenses with AF available from Canon, Sigma, Tamron, Tokina, only dedicated shooters will "bother" to buy expensive, heavy MF lenses instead. Or buy used Contax lenses, slap an adapter on, do a little filing if required, and deal with stop-down metering.
So what you are seeing on this thread (and others like it) is not primarily the product of these excellent lenses, but great ability from the people holding the cams (yours truly excepted, of course).
Canon EOS 5D Mark II 135mm f/5.6 1/1000s 100 ISO 0.0 EV