Definition of extension tube in English:

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extension tube


A tube fitted to a camera between the body and lens to shorten the distance of closest focus of an object so that close-up pictures can be taken.
Example sentences
  • I have been there when the Puffins are so close that you couldn't even focus on them with a 300 mm F2.8, without using an extension tube.
  • If you are using a camera like these, an extension tube or a close-up lens is the ideal tool.
  • I would also get some extension tubes, you can use these on both of the zoom lenses.
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