[Brightcolours]

But next to this heavy file size battle for me is the problem, the lenses DPReview used to produce the samples are all Art lenses, therefore the camera is merely an appendix to a fat piece of glass - and I'm not even talking about the latest monsters like 20/1.4, 85/1.4 or 135/1.8 (why didn't the y go the full f/1.4? 1 kg are or less, do they care about weight?).

A reason no to make a 135mm f1.4 is limited mount diameter. The Nikkor 105mm f1.4 already shows the effects of that (strong "swirly bokeh"), with a 135mm the problem would be bigger.