※ This device is not guaranteed to work with any third-party equipment. Please purchase only if you are familiar with cameras and machinery. This is a mount adapter that allows you to use EF mount lenses on Fujifilm cameras with X mount. I am selling it because I plan to sell all of my FUJIFILM cameras. Some lenses may not be compatible, so please refer to the official website's compatibility chart. The firmware is likely one version behind. Please update it before use. The package has some damage and dirt. As a bonus, I'm including: PK-FX PRO PK/DA-FX FX-Konica M42-FX MD-FX M39-FX FUJIFILM genuine lens rear cap x 2 Compatible rear cap x 4