This extension tube is designed for NEX mount lens to at closer distance with higher magnification. The set of adapters consists of 2 rings of different lengths which can be singly used or in combination. Since the magnification changes according to the length of the lens, you can easily make close-up of small subjects. It enables you to use all 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. closer has the effect of magnifying your subject (making it appear larger in the viewfinder and in your pictures). They are exceptionally useful for Micro-photography, enabling you to convert almost any lens into a Micro-lens at a fraction of the cost while maintaining its original optical quality. When using the extension tubes alone (10 mm or 16 mm) or combination (10mm+16mm=26mm), the length of lens should be the length (10mm 16mm or 26mm ) of the tube. Color: Black Material: Aluminum Alloy Package Contents: 1 x Metal Macro Camera 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.