[Sylvain]

Why not?


As I said, nice lens on MFT. But it is not a lot smaller than "f4" lenses on APS-C, is it?

Indeed, new buyers should have a look at the new Zeiss 16-70 f/4.

24-105 equiv. in a body that is comparable in size with the new olympus 24-80 equiv.

 

In terms of sensor efficiency, we do not see a full stop difference between a nex-6 and an OMD E-M5 IIRC but that discussion is relevant to low light situation, and frankly, few people will think "I wish I had a f/2.8 on MFT" while shooting a F/4 on an APS-C. So DOF wise, the Zeiss offers similar control on a lens with the same size and offering 25mm more in FF equiv.  Worth a look IMHO.