The Kenko Macro Automatic Extension Tube Set DG is designed to enable lens to focus closer than its normal set minimum focusing distance. 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.
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 sensor plane. By moving the lens further away from the sensor in the camera, the closer the lens can focus. This set consists of three tubes (12mm, 20mm, 36mm) which can be used individually or with 2 or all 3 tubes stacked. (less