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
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 :)
I know that You may not like this photo due to flare. It is like Horst Wittmann advertised me, after Hubert Nasse. Edges looks badly. It is still hard to move on...
aquilan
