Goliton Metal Auto Focus Macro Extension Tube EF EF-S for Canon 5D Mark II III 6D 7D 50D 60D 70D 550D 600D 650D 1100D Rebel T3i T4i T5i Canon Mount: Fit for Canon EF/EF-S Lens and DSLR Body. It moves the lens farther from the film or digital sensor. The farther away the lens is, the closer the focus, the greater the magnification. his extension tube does not affect image quality as there is no optics inside. In comparison, a close up filters are often blamed for degrading image quality. Made of metal ; Color: Rad;