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Macro Photography, also known as close-up photography, is the photography of small objects. A macro lens is a lens that offers a magnification of either 1:1, (1x) or sometimes only 1:2 reproduction.
Macro photography should be done in color, not in black and white as this hides detail. Macro filters are better to use than a macro lens. Rain drops on a flower petal can be a good focal point. The amount of magnification gained from the extension tube depends on the focal length of the lens.