Nikon F mount, NIKON Ai-s NIKKOR 50mm F1.4, excellent condition. Operation: Works without any problems. Optics: Optically, there appears to be very fine dust, but no mold is visible. It's in very clean condition. At the time of purchase, the product description stated "slight haze when exposed to strong light," but I couldn't confirm this. Appearance: Both the lens and the body are in clean condition. I will ship it as soon as possible after purchase. Thank you.