Features 1、This extension tube is designed for macro shooting, it is made of qualified ABS and metal contact. It perfect matches with Canon EF/EF-S camera, and support automatic focus. 2、It is mount lens to shoot at closer distance with higher magnification. The set of adapters consists of 3 rings of different lengths which can be single used or be used in combination. 3、Since the magnification changes according to the focal length of the lens, you can easily make close-up shots of small subjects. It enables you to use all shooting modes of the camera, exposure compensation is required. 4、Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance. Getting closer has the effect of magnifying your subject while maintaining its original optical quality. 5、When using the extension tubes alone: 31mm or 21mm or 13mm, or use them in combination: 31mm+21mm+13mm, the focal length of lens should be greater than the length of the tube. Specification Features: This extension tube is designed for macro shooting, it is made of qualified ABS and metal contact. It perfect matches with Canon EF/EF-S camera, and support automatic focus. It is mount lens to shoot at closer distance with higher magnification. The set of adapters consists of 3 rings of different lengths which can be single used or be used in combination. Since the magnification changes according to the focal length of the lens, you can easily make close-up shots of small subjects. It enables you to use all shooting modes of the camera, exposure compensation is required. Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance. Getting closer has the effect of magnifying your subject while maintaining its original optical quality. When using the extension tubes alone: 31mm or 21mm or 13mm, or use them in combination: 31mm+21mm+13mm, the focal length of lens should be greater than the length of the tube. Specifications: Condition: 100% Brand New and High Quality Brand: SHOOT Material: ABS + Metal Diameter: Approx. 6.5cm / 2.5inch Height: Approx. 8cm / 3.1inch Fit Camera: for Canon EF/EF-S Tube Focal Length: 31mm+21mm+13mm Weight: Approx. 186g Packing List: 1 x Lens Extension Tube Set (31mm+21mm+13mm) * The camera is not included.