This is a wide-angle prime lens for EF mount. I'm selling it because I urgently need money. Because it's wide-angle and this bright, I think it's the perfect lens for taking pictures of stars this season. There is some dust inside the lens, and a faint shadow appeared in the image when stopped down to the maximum aperture. The inside of the lens looks relatively clean, but please understand that there may be some slight clouding or overlooked mold. There is some kind of shadow on the edge of the front lens (see photo 6), but I think the impact is minimal. Operation has been confirmed. No returns or refunds. Shipping costs can be discounted for bulk purchases. - Brand: SIGMA - Mount: Canon EF Only the lens body and front and rear caps are included. No hood. - - Thank you for looking.