This is a Canon EF mount lens, the Canon EF 24-105mm F4L IS II USM. It's the second version. I used it with a Canon 5D Mark IV and a Canon R6. I'm selling it because I'm changing my equipment setup. I haven't used it very often. To prevent any issues, please understand that all sales are final, with no returns accepted. ■ Purchased new 1.5 years ago, one owner. ■ Includes all original accessories (no missing items). ■ Used in a smoke-free environment. ■ No pets.