This is the standard lens for the Mamiya Press, the Mamiya-Sekor 90mm F3.5. This lens was originally made as an interchangeable lens for the Pentax 67. Since I no longer use medium format cameras, I removed the shutter and converted it to an M42 mount lens. As it was used for film photography, there is some aging. The optical elements have almost no scratches, and although I disassembled and cleaned them during the rework, some mold stains remain. I don't think it will affect the photos, but please refrain from purchasing if you are concerned. You can take photos with the high-resolution center part of the medium format lens. Since it's an older lens design than the RB and RZ series, it produces a retro-style rendering. For those who love Mamiya, how about playing with this lens? Thank you for your consideration. Other features... Old lens, with rear lens cap.