This is the Rokinon  24mm f1.4 ED AS IF UMC Full Frame Wide Angle Lens for Canon EF Mount. Model number is RK24M-C. It is MANUAL focus.  An excellent low-cost fast wide-angle lens for night photography, which is what I have used it for. I like the 24mm focal length for Milky Way and aurora and so this has been my go-to lens for night shots.  I have cared for it well and it has probably been out on about 15-20 night shoots and that's it.  Comes with the original bag, box, and other packaging shown here. Free shipping to the continental U.S. or pick-up in Naperville, Illinois.