Leica M + Pentacon Six (P6) lens
COMPATIBLE IN THEORY
The flange focal depth should allow conversion, but...
However, why are there no suitable adapters is a different question.
This can be mended by getting a Canon EF -> Leica M adapter, then another P6 -> Canon EF adapter, that you'll be able to mount he lens. Keep the crop factor in mind, and the changes in the focal point and brightness.
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