[JJ_SO]

OL said: From a value perspective, the Sigma 50mm f/1.4 HSM DG ART may be interesting but then again - what's the point of using an even bigger lens on a smallish camera. That would somehow defy the purposes of choosing a mirrorless system in the first place. 

I never will agree on this reduced perspective of mirrorless systems. Mirrorless systems which focus on film or sensor level all have the same advantage: no indirect focus system, you usually get what you see. Weight or size reduction is one side effect, but not the highest advantage.