The DG II extension tubes have no optics. They are mounted in between the camera body and lens to create more distance between the lens and film plane. By moving the lens father away from the film or CCD sensor in the camera, the lens is forced to focus much closer than normal. The greater the length of the extension tube, the closer the lens can focus.
It is with electronic contacts,which make it support automatic focusing,automatic exposure,etc. This tube is with 1/4' tripod mounts. 2 caps (front and rear caps) included to protect the mounts.
Specification: Diameter of the tubes: Approx. 62mm Tube length: 25mm Material: Metal Suitable for: All EOS EF / EFS lens and camera with EF/EF-S mount
Package including: Fotga metal automatic macro extension tube 25mm DG II X 1 cap x 2 (in origial package)

Technical Details

Product Details

Package Dimensions
Width : 2.9 inch
Height : 1.8 inch
Length : 2.9 inch

Shipping Weight: 0.8 ounce (View shipping rates and policies)

ASIN : B00AMD3B88