The listing, >==Vivitar 80-200mm 1.45 auto zoom lens Canon FD-mount==< has ended.
This is a Vivitar 80-200mm 1.45 auto zoom lens Canon FD mount lens. I don't know much about lenses, and I'm not sure about the aperture blades. I turn the ring and it appears to be stuck in the open position. But, the aperture mechanism on an FD lenses is only activated when it is connected to the camera, if I understand correctly, and depending on the camera, will only noticeably close when the stop-down lever is pressed. So it might be nothing. It focuses fine and the image the the viewfinder is crisp and clear. The problem might be oil contamination on the blades, keeping them stuck in the open position which would require major disassembly to clean. A job I wouldn't attempt,....maybe.