This is the Megadap EFTZ21 mount adapter. It converts Canon EF mount lenses to Nikon Z mount. It's practically new, having been used only once for testing. I tested it with an EF mount lens, and it worked very comfortably, including autofocus. I'm selling it because I'm getting rid of my Z mount camera. - Brand: Megadap - Model: EFTZ21 - Type: Mount Adapter - Design: Black - Country of Manufacture: China Thank you for looking.