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10 Απρ 2020 · An extension tube is a spacer that sits between your lens and the camera body to alter the MFD (minimum focus distance). The MFD of a lens is a measurement of the closest point a subject can be from the camera’s sensor, whilst still being able to focus.
3 Φεβ 2023 · An extension tube isn't much more than a hollow ring of metal, as there are no lens elements inside. All it does is act as a spacer between your camera and lens so you can get closer to your subject and still maintain focus.
28 Φεβ 2023 · An extension tube is an attachment that goes between your camera body and your lens. It’s not an optical element, so there is no glass involved. All it does, is get the lens further away from the focal plane. Now, the practical upshot of this, is that your minimum focusing distance gets smaller.
An extension tube is a hollow, light-tight tube that fits between your lens and your camera mount. It moves your lens further from the camera, and the front element closer to the subject. The closer you can focus, the more magnification you get.
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An extension tube is simply a metal or plastic tube that you connect to your setup between the digital SLR camera body and the lens. It makes the lens look as though it’s longer than it actually is. Or in other words, it extends the lens.
The purpose of an extension tube is to alter the MFD, or Minimum Focus Distance of a lens so that you can make your subject larger in your image. The MFD of a lens is simply the closest point at which it’s possible for a lens to focus, and it’s different for every lens.
