I've done legacy glass on a NEX and on m43. It was tough at first on the EP1, but the later m43 cameras had very easily accessed buttons for MF assist. The NEX cameras were OK. The LCD was very nice, but I never had much time with a NEX with a VF I did have the XE1, but it seemed to me that the EVF would be very laggy to successfully focus with MF legacy lenses. Have you tried MF legacy lenses on Fuji as well as other systems? What are your thoughts and inputs in terms of comparisons?