Leica Elmar f=9cm 1:4 L39 screw mount. Can be converted to M-mount and used with mirrorless cameras. The silver lens barrel is wrapped in leather, giving it a classic, vintage look that anyone can recognize. It has the soft color rendition and Leica-like contrast of an old lens. Capturing backlighting can create a beautiful world of light. It also has high resolution and can be enjoyed in combination with mirrorless cameras. A key feature is its thinness, which is not found in modern lenses. The diameter is only about 40mm at its widest point. This is excellent for taking photos through fences or parting foliage, such as in railway photography. In terms of focal length, it's perfect for portrait photography and photographing animals like cats. As one of the most affordable Leica lenses, it's recommended as a first Leica or first vintage lens. Sample photos taken with this lens are provided. It produces bubble bokeh that emphasizes the outline of the bokeh, and being a medium telephoto lens, it has shallow depth of field and a large amount of bokeh when wide open, but sharp resolution when stopped down. Light bleeding and flare appear in the sun and bright areas. This is a common characteristic of this model rather than just this lens, and the sun stars extend when stopped down. This lens has a rare history of being polished by Yamazaki Optical Laboratory. What's rare is that polishing and maintenance costs a considerable amount, so it's not often done on inexpensive lenses, and it's quite rare for an affordable Elmar 90mm. Perhaps someone cherished it and took great care of it before it came to market. Upon close inspection, there are some cleaning marks on the rear element, but they shouldn't affect the image quality. I think the haze from aging has been almost completely removed, so it should continue to perform well for a long time. Condition: Rare Yamazaki polishing, very clean optics Appearance: No noticeable dents, some scratches from use Optics: No mold or haze, cleaning marks on the rear element Operation: Tested and confirmed with α7 Accessories: Front and rear caps, protective filter Stored in a dehumidified storage box #M-mount #Single-focus #90mm 9036 *All used lenses on sale have been tested and confirmed to work! *Evaluations are subjective. Please understand that these are used items. *Returns are accepted, so please feel at ease! (For items not discounted, you will be responsible for return shipping costs, please consult before leaving a review) Focal length...71-150mm Maximum aperture...2.9-4