Extension tubes are designed to enable a lens to focus closer than its normal 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 PROMASTER Digital Extenstion Tube Set includes 3 tubes that can be used individually or in any combination to achieve the desired magnification. In addition they have been specially tuned to maintain the tight tolerances required for proper communications between the lens and body of your digital SLR.

• Set includes 12mm, 20mm, and 36mm tubes
  
• TTL/EE metering: Perfect coupling
  
• Diameter: 62mm
  
• Weight: 2.1/3.0/4.4 oz.
  
• Includes case