Here a snapshot quickly made with this lens. Years ago i was making a knitting catalogue in analog and slide in studio. I used it and was unlucky cause i forgot something important with that lens in analog, on the lens barrel focussing, there is exposition compensation reminder for each ratio you reach, the 100 MC that i sold has the same problem (i've bought the MD one after), and more, there some light falloff/bad reflection problem with the back of the lens tunnel cover with the 100MC, that has been corrected with the MD version.

Anyway now the digital camera compense itself the exposure so here the pic:

ISO 400 Æ’/3.5 1/125s

That is very sharp! Thanks for the thread, I'll be updating the Index soon.