This brand new Macro Extension Tube Set for film & Digital SLR includes 3 extension tubes - 13mm, 21mm, 31mm adapters and a male & female adapter. You may mount the tubes between lens and camera body to get your choice of macro ranges. There are totally 8 combinations. Use this set will not downgrade the optical quality of your lens. Sharpness and Saturation can be still maintained. The item include auto focus function. Key Feature: 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. This 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. Brand new, never used;; Color : black Package Contain: Brand New Extention Tube x1 Tube case x1 User manuel X1