Comment by porphyra

With regards to the size and weight of lenses, Sigma also announced the most compact autofocus 50mm f/1.4 lens ever along with the FP-2, which is even smaller than their 50mm f/2 lens. It's really nice when you can just toss a full frame camera with a 50mm f/1.4 into your pocket. Of course, the autofocus is slower and there is no IBIS or EVF. But when it comes to the pareto frontier of small size versus full frame image quality, this is it.