Mcoplus Extnp Auto Focus Macro Extension Tube Set for Nikon AF AF-S DX FX SLR Cameras Why choice Mcoplus Mcoplus not only focus on providing photography accessories but also excellent after-service, Appreciate advance for your support and positive affirmation  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 as there is no optics inside. In comparison, a close up filter is often blamed for degrading the 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 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:   AF Macro Extension Tube for Nikon x1  Front & Rear Caps x1.