Introduction: The set is consist of two full autofocus tubes of different length - 10mm and 16mm, which can be used together or individually to obtain the different magnification. This Autofocus Extension Tube set provides 2 extension tubes that can be added between the camera and the lens, to make the lens focus at closer distances and produce higher magnification. Extension tubes are tubes with a rear-lens mount at one end and a camera-body mount at the other end. This Extension tube set does not affect image quality as there is no optics inside. In comparison, a close up filters are often blamed for degrading image quality. It moves the lens farther from the film or digital sensor. Suitable For: Canon EOS M mirrorless cameras