Electronic Mount TTL Auto Focus AF Macro Extension Tube Set Ring for Nikon D7100 D5200 D3200 D800 D800E D5100 D7000 D3100

Note:
You need to press the switch of the extension tube when you use the extension tube on 5200， 5100， 3100 and 3200 camera. The extension tube only support manual focus when work with 5200， 5100， 3100 and 3200 camera.

Features:
Support accurate TTL & Autofocus.
Built-in electric pins.
Combined with 3 tubes in different length: 12mm， 20mm， 36mm.
Made of high-quality ABS that is more strong.
Upgraded circuitry to work better with digital SLRs cameras and SLR lenses.
Superior lock pin which can tighten the tube joint.
Perfect for macro shooting.
High quality and compact.

Specifications:
Compatibility: for most Nikon lenses and Nikon DSLRS (such as Nikon D7100， D5300， D5200， D3200， D800， D800E， D5100， D7000， D3100， D300S， D5000， D700， D300， etc.)
Material: ABS， PC
Color: Black
Macro tube size: 6.9 * 8.9cm / 2.7 * 3.5in (D * H)
Macro tube weight: 188g / 6.6oz
Package size: 13 * 7 * 7cm / 5.1 * 2.8 * 2.8in
Package weight: 222g / 7.8oz

Auto Extension Tube	Distance Reading of Master Lens	Image Magnification Ratio	Field Coverage(cm)	Distance From Lens Front to Subject(cm)	Exposure Factor
12mm	Inf.	0.24	10 * 15	21	1.5
	0.5m	0.35	6.9 * 10.3	16	1.8
20mm	Inf.	0.40	6 * 9	13	2.0
	0.5m	0.51	4.7 * 7.0	14	2.3
36mm	Inf.	0.72	3.3 * 5.0	7.7	3.0
	0.5m	0.83	2.9 * 4.4	7.0	3.4
12+20mm	Inf.	0.64	3.8 * 5.6	8.5	2.7
	0.5m	0.75	3.2 * 4.8	7.5	3.1
12+36mm	Inf.	0.96	2.5 * 3.7	6.0	3.9
	0.5m	1.07	2.3 * 3.4	5.5	4.3
20+36mm	Inf.	1.12	2.2 * 3.3	5.3	4.5
	0.5m	1.23	2 * 3	4.9	5.0
12+20+36mm	Inf.	1.34	1.8 * 2.7	4.5	5.6
	0.5m	1.47	1.6 * 2.4	4.2	6.1

Package List:
1 * Macro Extension Tube Set
1 * Bag
1 * User Manual (English)
(Cameras and other accessories are not included)
 

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