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