On most lenses, the manufacturers provide a focusing mechanism that extends only a few millimetres, partly to keep down costs and partly to restrict the lens to extensions for which its optics are optimised. To provide additional extension, one or more extension tubes can be added between the camera and the lens, to make the lens focus at closer distances and therefore produce higher magnification.
This brand new Macro Extension Tube Set for Digital SLR includes 3 extension tubes - 7mm, 14mm, 28mm adapters and a male & female adapter. You may mount the tubes between lens and camera body to get your choice of macro ranges. There are totally 8 combinations.
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. 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.
When using the extension ring with a Canon body, the camera should be set in the manual mode.
Made of metal
Color : black
There are no electrical contacts in the extension tubes. Exposure has to be adjusted manually. Aperture control is not available if you use a lens which does not allow you to manually adjust the aperture (without an aperture ring).
Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter.
In this case since the lens does not have the ability to have its aperture controlled by the camera body. You can shoot with manual mode or aperture priority mode.
For this "AF Confirm" adapter, it is didn't mean you can use Auto focus, it only have an indication (bee sound) when you manual focus actually.
Nikon DSLR & SLR
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