A bizarre combo that seems like a perfect match. MINT Pentacon AV (all-metal) is a Trioplan variant for projectors. A Cooke triplet type lens known for its bubble bokeh. M42 200mm Sonnar body is depleted of optics and working nicely (Auto button bit hard to switch). Best thing: Pentacon AV 140mm lens put into the barrel has infinity on spot.

If you wish i can fix the lens permanently but deciding not to one gets to play with position. If lens is moved more to the border the effects of edge bokeh are pronounced. Playing this way you will need to use some thick foam to keep the lens in place. Besides you can use the Sonnar body to test other lenses.

Optimal image quality confirmed Sony A7 full frame. This combo easily covers Fuji GFX sensor.