Specifications

1.Autofocus extension tube set (12mm, 20mm, 36mm)
2.when screwed up it's smooth.
3.Welcome to Factory OEM

1.Automatic Extension Tubes are precision engineered for a precise fit and proper communications between your camera lens and body. it is a perfect solution to allow ultra close focusing without sacrificing the optical properties of your lens or the need to buy a more expensive dedicated macro lens.

 

2. The GreenL Automatic Extension Tube Set includes a 12mm, 20mm, and 36mm tube that can be used individually or in combination to gain the right magnification for your particular need. 

3. Set includes: 12mm, 20mm, and 36mm tube in a pouch case

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).

 

4.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.