The SIGMA EX DG Fisheye 8mm f/3.5 is a fisheye lens that provides a wide-angle and unique perspective. - Brand: SIGMA - Model Name: EX DG Fisheye 8mm f/3.5 - Mount Type: Canon EF Mount - Focal Length: 8mm - Maximum Aperture: f/3.5 - Included Accessories: Lens cap, case I purchased this new. I am selling it because I haven't had the opportunity to use it. It is in beautiful condition. There is no dust, debris, or mold inside the lens.