Demetris C Christodoulides

Excellent article, thanks. However, what do you mean exactly: Mirrorless lens mount - everything fits (including Canon EF). Leica M lenses are the cream of the crop and to shoot 4K with these is a dream I regard you talk about the α7s? Doesn't it need metabones speedboster 4k ef to sony ex adapter in order to work with canon ef lenses?