I just got my c-mount adapter (from Poland via ebay) and quickly attached my 50 f1.4 cosmicar (from Argentina via ebay also arrived today).
Everything checked out fine and looks great so far. But, the lens ends up 180 degrees reversed from where I would want it - so the f-stops and focus point are not visible. Loosening the lens to put it right prevents infinity focusing. Is my adapter at fault or is this an unpredictable situation?