Auto Focus Macro Extension Tube Set for Canon EOS 5DS R, Rebel T6s, 5DS, Rebel T6i, 7D Mark II, 5D Mark II, Mark III, 6D, 70D, 7D, 60D, Rebel T2i, T3i, T4i, T5i and SL1 Camera & an eCostConnection Complete Starter Kit Designed to enable a lens to focus closer than its normal set minimum focusing distance. Magnifying your subject (making it appear larger in the viewfinder and in your pictures) Tube Set Includes: 13mm, 21mm, & 31mm extension tubes Designed with all the circuitry and mechanical coupling Lightweight design Tubes can be used individually or in any combination to obtain the desired magnification