It's a Leica L-mount, not an SA-mount. This is a used SIGMA 50mm F1.2 prime lens. I bought it just two months ago, but I'm selling the camera body, so it's practically unused and has been stored in a dehumidified cabinet. I'd like to sell it to someone who will take good care of it. It's used, so there may be some signs of use. There are no noticeable scratches or visible dust inside the lens. The 50mm F1.2 specs are out of this world, and it takes amazing photos even wide open. #SIGMA #Sigma #50mm #PrimeLens