Leica M mount. Overall, it's in good condition, but there are scratches from the snap-on hood. Other than that, I think it's very clean, including the optics. The high-performance LEICA ELMARIT-M 28mm f/2.8 ASPH. lens boasts excellent descriptive power. - Model name: LEICA ELMARIT-M 28mm f/2.8 ASPH. - Lens type: Single-focus lens - Aperture: E39 - Accessories: Lens cap - Condition: Good - Country of manufacture: Germany Thank you for viewing.