The extension tube is designed for Canon EOS-M EOS- M2 EOS-M3 system Camera.The adapter consists of two loops of different lengths, and can be used alone or in combinationIt allows you to use all the shooting modes of the camera and requires exposure compensation.The closer you zoom in on your subject (making it look larger in the viewfinder and picture).insects or flowers,Furthermore,electronic signals between the camera and lens are transferred through the electronic contacts of theAutomatic Extension Tube for Micro Four Thirds,When using an extension tube (10 mm or 16 mm) or a combination (10 mm + 16 mm = 26 mm), the focal length of the lens should be greater than the tube length (10 mm 16 mm or 26 mm).Mounting the Automatic E