This Metal AF Extension Tube Set can perfectly transform your lens into a Macro Lens for great Macro shooting. It drives the lens by film or digital sensor and does not affect aperture and image quality. Meanwhile, it is combined with 3 pieces of different tubes (length: 12mm, 20mm, 36mm) which can either be used separately or in any combinations (totally 7 different combinations) to satisfy your different magnification requirement. Furthermore, the tube is electronic one that can achieve functions of Auto-focus as well as TTL auto exposure by working with most Nikon lens.

Features:
-Support accurate TTL & Autofocus.
-Built-in electric pins.
-Combined with 3 tubes in different length: 12mm, 20mm, 36mm.
-Made of aluminum(not plastic) 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: Aluminum, ABS, PC, Lead
-Color: Black
-Macro tube size: 9.00*6.50*6.50cm
-Macro tube weight: 220.00 g