Samyang MF 14mm F2.8

Measured against Sony mirrorless, 43 MP, KB: In the case of a super-wide-angle lens, we don't expect perfect imaging all the way to the edges at open aperture. But in the centre of the image, the performance must fit. But this is exactly what the Samyang does not achieve: the resolution and especially the contrast are clearly too low in the centre at aperture 2.8...