The Mamiya Sekor Shift C 50mm f4 lens is a speciality medium format wide angle shift lens designed of the Mamiya 645 mount. The lens rotates 360 degrees, with 30 degree interval stop – but it can be used between stops, too. The lens has a maximum horizontal shift of 13mm and a maximum vertical shift of 16mm when at 90 degrees. The shift knob has a slight unevenness in its actionthat doesnt impact function. In good cosmetic condition, with minor signs of wear and minor dust in the glass.