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)