The Fuji MCEX-16 is a 16mm Extension Tube designed for the Fuji X-mount system. Key features include:
Fuji X-mount compatible
Noticeably reduces minimum focusing distance
Electronic contacts to retain autofocus and autoexposure
Durable, high-quality build
Shortens Minimum Focusing Distance. Extension tubes are used to reduce the minimum focusing distance of the lens mounted. The Fuji MCEX-16 noticeably decreases the focusing distance. You can check this magnification chart for a rundown of possible focusing distances.
Electronic Contacts. The built-in electronic contacts enable both autofocus and autoexposure capability, as well as transferring lens information to the embedded image EXIF data.