I'm selling this because I don't use it much anymore. Includes a Canon genuine case and the original box. Although it hasn't been used much, there's some shine on the front lens cap. It's an RF mount, but I'm listing it as EF mount. Canon Model Name...RF16mm F2.8 STM Focal Length...16mm Maximum Aperture...2.8 Other Features...Includes front lens cap, rear lens cap, and original box.