Product Description: The AF Extension Tube Set can transform your Lens into a Macro Lens It moves the lens from the film or digital sensor. The closer the focus is, the greater the magnification The extension tube does not affect image quality as there is no optics inside. In comparison, a close up filter is often blamed for degrading the quality of image This is used by attaching between camera body and lens of the 35mm single-lens reflex camera.It comes as a set of tube of different lengths which singly or in combination makes it usable in 7 different lengths It couples perfectly with the camera's automatic diaphragm. With cameras of TTL, AE(Through-the-lens,Atuomatic Exposure) type it gives perfect coupling except when combined with electronic flash AE unit Specifications: N-AF1-B Budget version extension tube set Professional extension tube set, design for Nikon DSLR Support AF Configuration:Engineering plastics material + metal bayonet, perfect match with Nikon DSLR camera and lens Length:12mm+20mm+36mm, seven kinds of combinations, seven kinds of magnifications Package Includes: 1 x Mcoplus AF Macro Extension Tube for Nikon 1 x Front & Rear Caps