This is a West Germany-made Planar 100mm f/2 lens. While the 85mm f/1.4 is more mainstream, the 100mm f/2 is easier to focus and is a rare lens due to the significantly lower production numbers. ◎Stored in a dehumidified cabinet. Manufacturer: CONTAX Product Name: Planar 100mm f/2 Type: AEG Country of Manufacture: West Germany [Mount] Contax Y/C ※The size item says αE mount, but it is a Y/C mount. [Condition] (Appearance) Noticeable small scratches and scuffs, showing considerable use. (Optics) ・The lens surfaces are in good condition with no noticeable scratches. ・Clear when viewed visually. When illuminated with a light, there is a circular, faint haze on the middle element (I didn't feel it affected the image quality). ・Some dust and debris present. (Focusing Ring) Smooth and in good working order. Grip is also good. (Aperture) Operates normally, no oil stains. [Included Accessories] Front cap Rear cap Filter Carl Zeiss Planar 100mm f/2 Lens Other features... Old lens