Description:This Macro Extension Tube Set for Canon enables the lens to focus at closer distances and produce higher magnification.The 3 extension tubes can be added between the camera and the lens.Extension tubes are metal tubes with a rear-lens mount at one end and a camera-body mount at the other end.Does not affect image quality as there is no optics inside.This extension tube consists of 5 parts:Camera Body Mount AdapterLens Mount Adapter9mm tube (Tube 1)16mm tube (Tube 2)30mm tube (Tube 3)NOTE:There are no electrical contacts in the extension tubes. Exposure and focus have to be adjusted manually.Aperture control is not available if you use a lens which does not allow you to manually adjust the aperture (Without an aperture ring)Package Included:1 x Macro Extender Tube