Rare Dallmeyer Dalmac 6 inch f/3.5 cine Dallcoated lens. The front and rear glass are in pretty decent condition with few tiny nicks but no serious scratches or coating loss. Internally there are coating wipe marks and coating deterioration spots, maybe very slight haze. Still looks pretty clear and performs well. Aperture opens and closes easily. There is a rear M57x1 mounting thread