Extension Tubes for Macro Photography

Extension tubes are designed to let your lens focus closer than its normal minimum focusing distance. This has the effect of magnifying your subject, making it appear larger in the viewfinder and in your photos. They are great for macro photography, allowing you to turn almost any lens into a macro lens at a much lower cost, while still keeping its original optical quality.

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 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.

The Kenko DG Auto Extension Tube Set contains three tubes of different length, a 12 mm, 20 mm, and 36 mm, which can be used individually or in any combination to obtain the desired magnification.

Kenko's 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 camera's AF system properly.