RICOH Rikenon 50mm F2 Old Lens Pentax K-mount. This lens, a standard K-mount lens, likely prioritized mass production and cost-effectiveness. However, the extensive use of plastic makes it incredibly lightweight and easy to handle. It's a highly recommended first old lens. This particular generation is thinner than other models, almost a pancake lens in its compact size. In terms of image quality, its remarkable central resolution was even reviewed in magazines as being comparable to the Leica SUMMICRON. This has earned it the nickname "Japanese Summicron," making it a top-value lens in the old lens community. I've prepared some sample photos taken with this lens. I tried to emulate the Summicron, but of course, the results are different. Depending on the generation, the Rikenon may have better color rendition, and I think it has more vibrancy, especially in night scenes. There are some instances of purple fringing in areas with high contrast, but the sharpness of the image is sufficient. If you're looking for an affordable, sharp old lens, I'd recommend this one. The condition is good, with no noticeable mold or haze, only dust, and the exterior is also in good condition. The focus is light, but not to the point of grease separation. It's a good condition item, considering the lack of accessories. Condition: Tested and works well! Good condition. Exterior: No noticeable scratches, minor wear from use. Optics: No mold or haze, some dust. Operation: Tested and confirmed working on α7. Accessories: Body only. Stored in a dehumidified cabinet. #Summicron #SUMMICRON #RIKENON #Rikenon #Kmount #OldLens 5713 *All used lenses for sale have been tested and confirmed to work! *Evaluations are subjective. Please understand that these are used items. *Returns are accepted, so please feel free to purchase with confidence! (For items not discounted, you are responsible for return shipping costs, please consult before leaving feedback)