This is a single-focus lens from Kiyohara Optical, the VK50R 5cm F4.5. It's the second generation of the so-called Kiyohara Soft lens. Unlike the first generation, the VK70R, this lens can be used as a standard 50mm lens on full-frame cameras. It's an interesting lens that allows you to experience the image quality of a Bessar lens with 35mm film or digital camera bodies. It has a Leica R mount. The mount can be changed with dedicated parts. ☆ All functions have been confirmed to work. ◎ Regarding the exterior, there may be some minor scratches on the lens barrel, but no noticeable scratches were found, and it's in surprisingly good condition considering its age. ⇛ I believe it's a beautiful item. ◎ Regarding the optics, there may be very fine dust particles due to it being an old lens, but there were no signs of mold or clouding that would cause problems in actual shooting. It's in surprisingly good condition considering its age. ⇛ I believe it's in good condition. ◎ A metal front cap, which was included at the time of purchase, will be included. It is unknown whether it is genuine. ☆ Even among Kiyohara Soft lenses, the VK70R is occasionally seen on the market, but the VK50R is a very rare lens that is rarely seen. The Leica R mount version is even rarer, and it is a genuine rarity. ☆ The lens mount may sometimes be loose. I didn't notice it during use, but if the mount screws loosen during transportation due to the structure, please tighten them before use. 50mm KIYOHARA SOFT VK50R