


Some additional information on the claim made by a Leica executive that Sony E-mount was initially developed for APS-C sensors and not specifically designed for full-frame mirrorless cameras (a story that was widely reported by many major websites, including PetaPixel, DIYphotography, Fstoppers sand others).
First, let’s take a look at this old interview with Mr. Kazuto Yamaki, the CEO of Sigma who clearly states that it is very difficult to make full-frame mirrorless lenses for E-mount because it almost looks like the E-mount was designed for APS-C and not full frame (Google translation):
































