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lens tube extension
image by Siim Vahur (Image rights)
Macro photography means making any kind of sharp close-up photos of objects at a distance shorter than the minimal object distance of a standard lens. Macro photos can be achieved with a macro lens, with an add-on close-up lens element (or add-on close-up single group achromatic lens) on a normal lens, with lens tube extension, or, the most exciting, with a reverse lens adapter (retro adapter).