Andoer AF Auto Focus Macro Extension DG Tube 10mm 16mm Set Ring Metal Mount for Sony E-mout NEX NEX-6 A7R A3000 Macro AF Auto Focus Extension DG Tube 10mm 16mm Set Ring Metal Mount. This macro extension tube set is suitable for Sony NEX E-mout. This tube enables a lens to focus closer than its normal set minimum focusing distance. Combined with 2 tubes in different length: 10mm, 16mm. can be used in any combination or individually to obtain the different magnification.