1.It moves the lens farther from the film or digital sensor. The
farther away the lens is, the closer the focus, the greater the
magnification
2.This extension tube does not affect image quality as there is no
optics inside. In comparison, a close up filters are often blamed
for degrading image quality
3.Use this set will not downgrade the optical quality of your lens.
Sharpness and Saturation can be still maintained. But they are not
meter-coupled
4.Automatic lenses can be used with their widest open aperture
only,
5.Compatible with :
Nikon
D3000,D3100,D3200,D3300,D5000,D5100,D5200,D5300,D7000,D7100,D7200,D300,D600,D610,D700,D800,D3X,D4,D4S,DF
Digital SLR Cameras