The phot r extension adapter tube for nikon has 3 individual rings which can be used separately with the camera body mount and a lens adapter but of course the magnification ratio will be different you have 8 range of different combinations the extension tube does not affect image quality as there is no optical element inside in comparison closes up filters are often blamed for degrading the quality of image this tube set consists of 3 individual tubes with lengths 7mm 14mm 28mm camera