Features:
1.application scope: document copying, Jewelry, insects, fish, flower and birds
2.compatible with: Cannon camera body&lens with EFor EF-S mount adaptor.
3.the cavity made up of a group od black tubular annex has mount  adaptor on bothe ends. it can ne connected between camera body and lens, and can change image field through changing physical displacement. its working principle is the same with bellows extension. the longer the extension rong, the closer the focus, and vice versa
4.the whole set includes one camera body mount adaptor, one lens mount adaptor and three tubes( tube 1 extension ring*9mm,  tube 2 extension ring- *6mm, tube 3 extension ring- *0mm). these three tubes can work independently or in combination, up to 7 different combinations available. by using this extension ring, an ordinary lens can become a macro lens, and macro and close-up shooting can be realized easily.

Specification:
1.material: aluminum- magnesium alloy
2.full length: *0mm

Package including:
1* camera body mount adaptor
1* lens mount adaptor
3* extension tube(9mm, *6mm, *0mm)