Thank you for viewing. I am sorry, but I do not have any knowledge regarding this product. It appears to be a wide-angle lens for the Mamiya 645, but please make your judgment based on the images. The lens is dirty, and when looking through it, there is some cloudiness in places, but it appears to be free of scratches. The body is very clean, but there are a few scratches from attaching and detaching it to the mount. A Kenko protector is attached. Is this the serial number? A 5-digit number is printed on it. There is a switch between A and M, so is it autofocus? I have not been able to confirm this as I do not have the camera body. I do not have any knowledge, so please purchase only if you can make your own judgment. Also, please be aware that the lens will be shipped in its current condition.