- Automatic Macro Extension Tube for Fuji X Mount camera is composed by two different ring(10mm, 16mm) which can be used alone or combined (3 Different Combinations) to meet your needs for different close-up magnification. - The connector is designed with new electronic technology, which can help you to achieve Auto-focus and TTL Exposure functions, it also supports Full-Frame Shooting. - It is a wonderful partner for Fuji X Mount lens and camera used for Macro Shooting ! - Extension Tube is only suitable for macro shooting, it can't focus infinitely after installing - The focusing distance is limited after installing Extension Tube, and the focusing range is different with different focal lengths so you can adjust the focal length by changing the distance between the object and the came.