Schneider-Kreuznach Schneider Symmar-S 150mm f/5.6 Helicoid Extension TUBE ASAHI PENTAX 6×7 Paint is chipped. There are white spots inside the lens. Operation not confirmed. It's possible that a different lens is attached, but I don't know how to disassemble it, so I'm selling it as is. I am not familiar with cameras, so I cannot answer detailed questions, but I can add photos or measure the size, so please let me know in the comments. I am selling many camera-related items, so discounts are available for combined purchases.