Tubes made from metal and, more frequently, plastic inserted between the lens and the camera, thereby making the lens to film distance greater. The result is increased magnification for close-up photography.
A set of rings or tubes of varying lengths, used between the camera body and lens to permit focusing the lens on subjects at close range.
These are a handy way to turn any long lens into a macro lens for ultra-close shooting. They are hollow metal tubes that are mounted between the camera and the lens. Typically they come in a set of different lengths which can be combined. It is a good idea to open up the lens a little when using an extension tube, as a little light is lost. It should be noted that they do not work when used with wide lenses. [Go to source
These devices are use for macrophotography. They allow your lens to focus to a closer distance than it normally would. The extension tubes mound between the camera body and your lens. They come with several different lengths which can be all screwed together and are of varying length. In this way you can make up several different lengths. They are less expensive than a bellows. See: Bellows and Reversing Ring.
Tubes or spacing rings interposed between the lens and camera body on cameras with interchangeable lenses to increase the lens film distance for close-up work.
Metal tubes used to acquire the additional separation between lens and film for close-up photography. They are fixed with screw thread or bayonet mounts to suit a variety of lens supports.
Hollow metal tubes that mount between the camera and the lens to permit closer that normal focusing. The longer the extension the closer the lens will focus, a lower priced substitute for a bellows unit.
Metal rings attached between the camera lens and the body to allow closer-than-normal focusing in order to increase the image size.
Various size spacers used between the camera and lens to reduce the Minimum Object Distance. Not recommended for use with zoom lenses due to the loss of tracking ability.
Hollow metal tubes that go between camera and lens to pern d closer than normal focusing. The longer the extension, the closer the lens will focus.
Metal or plastic tubes used on small format cameras, to extend lens-to-film distance, enabling magnification greater than 1x.