Neewer All-metal Auto-focus Macro Extension Tube Set 10mm&16mm for SONY E-mount Mirrorless Camera NEX Fixed Macro Extension Tube  (Pack of 2)

It comes as a set and contains 2pcs tubes in different length 10mm/16mm, each tube can work alone. It is with electronic contacts (well-built), which make it support automatic focusing, automatic exposure, etc. It enables you to use all shooting modes of camera, exposure compensation is required. The extension tubes have no optics. They are mounted in between the camera body and lens to create more distance between the lens and film plane.