On most lenses,that manufacturers provides a focusing mechanism that extends only a few millimetres, partly to keep down cost and also to restrict the lens to extensions for which its optics are optimised. To provide additional extension,you can add one or more extension tubes between the camera and the lens, to make the lens focus at closer distances and it can produce higher magnification. When using the extension ring with a Canon body, the camera should be set in the 'M' mode.The macro extension tubes is fit for the Canon EOS cameras including 1D,1Ds,5D,10D, 20D,30D,40D,300D, 350D,400D, 450D, or any canon SLR Use this set,it will not downgrade the optical quality of your lens. Sharpness and Saturation can be still maintained. But they are not meter-coupled. They do not preserve the automatic diaphragm. It should be used with manual lenses with their own aperture dial. There is no electronic connection between the body and the lens. Automatic lenses can be used with their widest open aperture only. Package Includes: One macro tube set.
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