>>4300915>>4300905And here is Sigma's 50-100mm f/1.8 APS-C lens. it has a similar field of view of 31.7 - 16.2. But is more than 3 stops faster and half the price, and a comparable MTF curve. The entire GF lens system is plauged by shitty lenses. Third parties dont make lenses for it. And from Fuji's own roadmap they might release a 500 f/5.6 this year, and it will probably be shittier than a Nikon 500 f/5.6 and cost twice as much.