[davidmanze]

The heavy vignetting (and swirly bokeh) are both because of the narrow F-mount. A lovely lens nonetheless.

Oh how ironic the world can be, while we're talking about large aperture F mounts.

 

Lenstips review of the Mitakon 85mm F1.2 in the Nikon mount... the Mitakon's vigneting..I quote:

 

"Employing the maximum relative aperture you have to take into account the loss of 45% of light (−1.73 EV) in the frame corners. It is not a low value but still the Mitakon is better than the Canon which lost as much as 51% of light. By f/1.4 the vignetting decreases to 40% (−1.49 EV). Once again that value is quite high but you should remember that the huge Otus by f/1.4 lost as much as 56% of light!" 

 

  Out bayoneted the Nikon F mount?  No........ how's that for a rabbit out of the hat-trick?