Fotasy Auto Focus Marco Extension Tube (10mm, 16mm, 26mm) for Samsyng NX Mount Camera NX300 NX1000 NX210 NX200 NX100 NX20 NX10 NX5 This 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 (making it appear larger in the viewfinder and in your pictures)They are exceptionally useful for macro photography, enabling you to convert almost any lens into a macro lens at a fraction of the cost while maintaining its original optical quality. Designed with all the circuitry and mechanical coupling to maintain auto focus and auto exposure with Fuji FX mount lenses It comes as a set of 2 tubes of different lengths which singly or in combination on makes it usable in 3 different lengths, 10mm, 16mm, 26mm. Compatible with Samsyng NX Mount Camera NX300 NX1000 NX210 NX200 NX100 NX20 NX10 NX5 and Samsung NX Mount Auto Focus Lens. Also compatible with Manual Lens, but Auto Focus Function will not supported.