Meike MK-C-AF1-B Plastic Autofocus AF Confirm Macro Extension Tube for Canon EOS DSLR 13mm 21mm 31mm

The AF Extension Tube Set can transform your Lens into a Macro Lens. It moves the lens from the film or digital sensor. The closer the focus is, the greater the magnification. The extension tube does not affect image quality as there is no optics inside. In comparison, a close up filter is often blamed for degrading the quality of image.

This tube set contains three piece tubes of different length -- 13mm, 21mm, and 31 mm -- which can be used individually or in any combination to obtain the desired magnification. These extension tubes are designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with most Canon lenses, given there is enough light to activate the cameras AF system properly.

Features:

• MK-C-AF1-B Standard version extension tube set.
• Professional extension tube set, design for Canon DSLR.
• Support AF
• Configuration:Engineering plastics material + Plastic bayonet, perfect match with Canon DSLR  camera and lens. 
• Length: 12mm + 20mm + 36mm, seven kinds of combinations, seven kinds of magnifications.