No issues. Rear has been cut off so it is possible to achieve infinity on Pentacon SIX without a mirror hit (please be careful nevertheless since different models of the camera). It produces sharp and high contrast image. Speed around F2.5 measured on Sony A7. There was no label to recognize model just an Isco stamp but there are 6 elements.
Interesting also to adapt FUJI GFX.
Shipping Worldwide: Signed For, Priority, Tracking. EU 5-10
days, Rest 3-4 weeks. Please check my other listings .de since
they are not visible .com. EU buyers: i can relist in EUR
currency if desired.