Thank you for viewing. Model Name: CONTAX Carl Zeiss Distagon T* 28mm f/2.8 MMJ Mount: Y/C mount Condition: Please check the photos. The aperture blades operate smoothly, and the focusing ring moves smoothly with appropriate viscosity. Included items: Front and rear caps (as shown in the photos) Although the size section indicates Nikon F mount, this product is a Y/C mount. *Due to my inexperience, there may be minor oversights. Please check the product images and understand that this is a used item sold as is. *To prevent tampering, returns, refunds, and exchanges are not accepted. Please understand this and agree to a no-claims, no-returns transaction.