Auto Focus AF TTL Extension Tube Ring 12mm 20mm 36mm Set Metal Mount with Covers for Canon EF EF-S 35mm Lens DSLR Camera

Auto Focus extension tube, designed for for Canon EF/EF-S 35mm lens to shoot at closer distance with higher magnification.

With camera of TTL,AE(through-the-lens, automatic exposure)type it gives perfect coupling except when combined with electronic flash AE unit.

Combined with 3 tubes in different length: 12mm, 20mm, 36mm, can be used in any combination or individually to obtain the different magnification. With camera of TTL,AE(through-the-lens, automatic exposure)type it gives perfect coupling except when c

Superior lock pin which can tighten the tube joint.

Comes with 2 covers for protection.