Vello Auto Extension Tube Set for Canon EOS Dolgin Engineering TC400-CAN-A60 It also comes with a

It also comes with a 1/4"-20 reducer for the 3/8"-16 hole on the bottom

Backing Vinyl cotton cloth Adhesive Type Synthetic rubber resin

13 lb Box Dimensions (LxWxH) 5

The kit even includes batteries

22 Conductor DC Resistance DCR @ 68&degF (20°C) (Ohm/1000 ft (304

Vello Auto Extension Tube Set for Canon EOS Dolgin Engineering TC400-CAN-A60 It also comes with aShortens Minimum Focus Distance of Lens Provides Macro Capability Full Autofocus Compatibility 13mm, 21mm and 31mm Tubes Can be Used Individually or Combined Metal Mount Lightweight Design For Canon EF and EFS Lenses The Auto Extension Tube Set for Canon EOS from Vello allows your lens to focus closer than its normal minimum focus distance. By placing distance between your camera body and lens, focusing distance is shortened and the effect of