It is installed between the lens and the fuselage, lengthening the lens barrel, and using the principle of skin cavity photography to achieve the effect of super macro. 1, 2, and 3 -up circles can be used alone or in combination. The the barrel length, the greater the magnification effect. Requires full manual operation It can be used in any combination or individually to obtain the exact magnification you need to capture the perfect macro shot. The the tube length, the closer the lens can focus. Model Number: Auto Focus Macro Extension Tube Compatible Brand: for X-pro1 E1 Focus Type: Auto Focus Lens Adapters Type: Extension Tubes color:Black Material:Metal Package Contents: 1 x Extension Tube Ring Adapter Set Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.