Generic Autofocus Macro tube for Micro4/3 M4/3 Camera GM1 GX7 GF6 GH3 G5 GF5 It comes as a set (10mm+16mm) Tubes can be used individually or in any combination to obtain the desired magnification 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 Magnifying your subject (making it appear larger in the viewfinder and in your pictures)