The Mamiya 70mm f2.8 Sekor C Leaf Shutter LS 645 Lens includes a built-in shutter with its own settings when the camera mirror is lifted and the camera shutter is overriden. This lens allows the use of flash at any speeds without incurring shutter shadow markings on film. It also allows to perfectly expose the background and use your fill flash for your subjects.
This is a USED lens, there is normal wear on the lens barrel and mount, but overall good condition. Focus is a little stiff, but does move smoothly. Did not see any marks or scratches in the glass.