It couples perfectly with the camera's automatic diaphragm. With cameras of TTL, AF( Through the lens automatic exposure) type, it gives perfect coupling except when combined with electronic flash AE unit.
Feature:Standard version extension tube set
Professional extension tube set, design for Canon Mirrorless Interchangeable Camera
Support AF
Configuration：Engineering plastics material + metal bayonet, perfect match with Canon EOS DSLR camera and lens.
Length :16mm+10mm, three kinds of combination, support seven kinds of magnification.
Campatible with:Canon EOS M M2 M3 M10 Mirrorless Interchangeable Camera
Package Include:Pixco Auto Focus Macro Extension Tube for Canon EOS M M2 M3 Camera x1pcs