Workshop

It has only vignette corrected by ACR. As You see this correction even with max values, it isn't perfect but I believe it is still usable. At APS-C f/8 gives a lot of DoF, which unifies corner's and center's sharpness. With FF there is such level of DoF with f/8, You need to balance between center and border focus, especially at such close-ups. This one if focused at borders, to illustrate if they are able to be sharp with BSI FF sensor and Hologon's lens design. It is taken handheld with steadyshot inside

Photokina of 2014 is comming :) we may expect new lenses from Carl Zeiss...

I believe that Adobe software, lens profile based distortion's correction makes the outcome of Distagon 2.8/15mm to look artificially and not pleasant to me. I like it more better without geometric distortion correction, lens profile based vignetting correction works better :)