Auto Focus Macro Extension Tube 3-piece Set 13/21/31mm for CANON EOS Camera EF EF-S 5D Mark II 550D 7D Auto-focus AF Wholesale

Features:
1.Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance. Getting closer has the effect of magnifying your subject (making it appear larger in the viewfinder and in your pictures). They are exceptionally useful for macro photography, enabling you to convert almost any lens into a macro lens at a fraction of the cost while maintaining its original optical quality.

2.The DG 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 far 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.

3.THIS AUTO EXTENSION TUBE SET contains three tubes of different length, a 13 mm, 21 mm, and 31 mm, which can be used individually or in any combination to obtain the desired magnification.

4.This Auto Focus extension tubes are designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with most Nikon lenses given there is enough light to activate the cameras AF system properly 

5.Made of Aluminum

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Notice: This product needs to use in the sun or bright light, If you use it in a dark place, it will more difficult to focus.

Compatible:
·For All Canon EOS DSLR or Film SLR Camera.
Such as: 7D, 550D, 1100D, 450D, 50D, 40D ect.

Package: 

1 x MK 3-Piece Macro Extension Tube Set For Canon (Only the Accessories,Camera not in)