Feature 1 This extension tube is designed for macro shooting, it is made of qualified ABS and aluminum alloy, and copper contact. It perfect matches for Sony single lens reflex camera, and support automatic focus. 2 It is mount lens to shoot at closer distance with higher magnification. The set of adapters consists of 2 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: 10mm or 16mm, or use them in combination : 10mm+16mm=26mm, the focal length of lens should be greater than the length of the tube.Features: This extension tube is designed for macro shooting, it is made of qualified ABS and aluminum alloy, and copper contact. It perfect matches for Sony single lens reflex camera, and support automatic focus. It is mount lens to shoot at closer distance with higher magnification. The set of adapters consists of 2 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 closeup 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: 10mm or 16mm, or use them in combination : 10mm+16mm=26mm, the focal length of lens should be greater than the length of the tube. Specifications: Condition: 100% Brand New and High Quality Material: ABS & Aluminum Alloy Diameter: Approx. 6cm / 2.3inch Height: Approx. 4cm / 1.5inch Fit Camera: for Sony E/FE NEX3 NEX5 NEX6 NEX7 A5000/A6000/A7/A7M2 Series Tube focal Length: 10mm+16mm Weight: Approx. 111g Packing List: 1 x Lens Extension Tube Set 1 x User Manual