Aputure AC-MC Macro Extension Tube for Canon Cameras (Black) Aputure Macro Extension Tube Set is the Perfect Macro Solution for your Canon Lenses. Supports Accurate TTL and AF Performance Compatible with all EF and EF-S Canon lenses Features a Super Elegant, Light, Portable, Professional and Compact Design Consists of 12 mm, 20mm and 36mm tubes, which can be used individually or in combination for seven different possibilities