Features: This macro extension tube set is suitable for M4/3 Mount. This automatic macro Extension Tube Set DG is designed to enable a lens to focus closer than its normal set minimum focusing distance. Designed with electronic contacts, which make it support automatic focusing, automatic exposure, etc. Combined with 2 tubes in different length: 10mm, 16mm,can be used in any combination or individually to obtain the different magnification. Superior lock pin which can tighten the tube joint. Perfect for macro shooting. Suitable for: Camera and lens with micro M4/3 mount.