Canon EF 17-40mm f/4L USM zoom lens, 77mm filter diameter, ideal for wide-angle photography. - Brand: Canon - Model: EF 17-40mm f/4L USM - Filter Diameter: 77mm - Focal Length: 17-40mm - Maximum Aperture: f/4 - Lens Type: Zoom Lens Thank you for viewing. There is a scratch on the window, but it does not affect use. Please note that this is a used item, so no returns or refunds are accepted.