Extension tube

Discussion in '35mm Cameras' started by Crecybattl, Jun 14, 2004.

  1. Crecybattl

    Crecybattl Guest

    I'm not familiar with "extension tubes" but read an article that mentioned
    using one. B&H site shows some for 35mm but doesn't explain what they're for.
    Is this for macro photography?
    Crecybattl, Jun 14, 2004
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  2. Extension tubes are used for close-up photography. They will allow you
    to mount your lens anywhere from a few mm to about 8 cm from its normal
    position, depending on how many of the tubes in the set you use. This
    allows you to focus on objects closer to the camera, to the point where
    you can fill the frame with something as small as a coin.

    You can simulate the effect by removing the lens on your camera, and
    holding it slightly away from the mount while looking through the

    The advantage of extension tubes is that they are inexpensive, and allow
    you to use your standard lens for closeup work. The disadvantages are
    that any lens imperfections will be magnified, you lose a substantial
    amount of light, and the depth of field will drop to almost nothing.
    James Robinson, Jun 14, 2004
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  3. Crecybattl

    Crecybattl Guest

    Thanks. That's the most clear and concise answer I've seen on this board.
    Crecybattl, Jun 14, 2004
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