Macro AF Auto Focus Extension DG Tube 10mm 16mm Set Ring Metal Mount for Sony E-mout NEX NEX-6 A7R A3000

Features:
This macro extension tube set is suitable for Sony NEX E-mout. 
This tube enables a lens to focus closer than its normal set minimum focusing distance.
Built-in electric pins, so it supports automatic focusing, automatic exposure, TTL, etc.
Combined with 2 tubes in different length: 10mm, 16mm.
can be used in any combination or individually to obtain the different magnification.
Superior lock pin which can tighten the tube joint.
Perfect for macro shooting.

Extension Tube	Distance reading of master lens	Image magnification ration	Field coverage(cm)	Exposure factor
10mm	inf	0.2	6.5 * 8.7	1.44
	0.5	0.31	4.2 * 5.6	1.72
16mm	inf	0.32	4.1 * 5.4	1.74
	0.5	0.43	3.0 * 4.0	2.04
10mm + 16mm	inf	0.52	2.5 * 3.3	2.31
	0.5	0.63	2.1 * 2.7	2.66

Specifications:
Color: black
Suitable for: Sony NEX E-mout cameras
Material: Metal & plastic
Macro tube size: 6.3 * 3.2cm / 2.5 * 1.3in (D * H)
Macro tube weight: 65g / 2.3oz
Package size: 7.2 * 7 * 7cm / 2.9 * 2.8 * 2.8in
Package weight: 95g / 3.34oz

Package List:
1 * Extension Tube Set
1 * User Manual