My rule of thumb for adapting the Helios-103, Menopta 53/1.8, and J-8 5cm F2 to the Nikon RF: undo the set screw and back out 1/2 turn. Tighten Set Screws. On the Helios-103 and Menopta, two set screws are used so you do not even need to tap out new ones. For the J-3, I custom shim the lens using a TTL viewer.
Menopta:
Distance shot, F4:
Center
Far edge:
Bright Background:
Menopta close-up and wide-open.
Tight Crop:
Another close-up and Wide-Open:
Tight Crop:
Menopta:
Distance shot, F4:
Center
Far edge:
Bright Background:
Menopta close-up and wide-open.
Tight Crop:
Another close-up and Wide-Open:
Tight Crop: