Is there a corner sharpness issue with adapted Super Wide-Angle lenses on Sony A7 Bodies?

[embed][/embed]In the above video - Scott investigates into the reported issue of corner sharpness when using adapted super wide-angle lenses on Sony A7 series cameras.Full res - uncompressed images can be downloaded below:Sony ImagesCanon Images.All images were shot RAW (uncompressed on the Sony). No processing done whatsoever in lightroom, standard sharpening added when exporting for screen.