WeiHe DG-NEX Auto Focus AF Macro Extension Tube Ring 10mm 16mm Set Metal Mount For Sony E-mount Lens<br>  <br> Feature:  <br> Superior lock pin which can tighten the tube joint.<br> Designed with electronic contacts， enables you to use all of the camera's shooting modes.<br> Auto Focus extension tube， designed for Sony E-mount lens to shoot at closer distance with higher magnification. This macro extension tube set is suitable for Sony E-mount lens. Combined with 2 tubes in different length: 10mm &amp;amp; 16mm，can be used in any combination or individually to obtain the different magnification. Its perfect for macro shooting of small subjects， insects or flowers.<br>  <br> Specification:  Brand: WeiHe<br> Color: Black<br> Suitable For: Sony E-mount lens<br> Material: Metal &amp;amp; plastic Compatible Brand: Sony， Minolta<br> Macro Tube Size: 6.1  x  3.2cm \/ 2.4 x  1.3in (D x H)<br> Macro Tube Weight: 64g \/ 2.3oz<br> Package Weight: 97g \/ 3.4oz     Image Magnification Rations and Exposure Factors ( 50mm Standard Lens )                Extensio Tube         Master Lens Distance Reading           Image Magnification Ratio         Field Coverage (cm)         Exposur Factor               10mm         inf         0.2         6.5  x  8.7         1.44               0.5         0.31         4.2 x 5.6         1.72               16mm         inf         0.32         4.1 x 5.4         1.74               0.5         0.43         3.0 x 4.0         2.04               10mm+16mm         inf         0.52         2.5 x 3.3         2.31               0.5         0.63         2.1 x 2.7         2.66      <br>  Package included:<br>  <br> 1 x Extension Tube Set<br> 1 x User Manual  Detail pictures: