SIGMA 10-20mm F3.5 wide-angle lens, Nikon mount, 77mm filter diameter, with lens adapter. - Brand: SIGMA - Model Name: 10-20mm F3.5 EX DC HSM - Lens Type: Wide-angle lens - Mount Type: For Nikon - Included Accessories: Lens adapter - Condition: Good - Filter Diameter: 77mm Thank you for viewing. This is a SIGMA ultra-wide-angle lens for Nikon. I purchased it new and am selling it because I stopped using cameras. There are no noticeable scratches. A lens adapter is also included as a bonus.