photomacrography$60421$ - traduzione in
![SLR]] and reversed lens](https://commons.wikimedia.org/wiki/Special:FilePath/Automatik-Balgengeraet mit Kamera, Objektiv und Umkehrring.jpg?width=200 "SLR]] and reversed lens")
![SLRs]]. Note the pen placed through the tube to illustrate that it does not contain any lens elements.](https://commons.wikimedia.org/wiki/Special:FilePath/ExtensionTube5733.jpg?width=200 "SLRs]]. Note the pen placed through the tube to illustrate that it does not contain any lens elements.")
![stereogram]].](https://commons.wikimedia.org/wiki/Special:FilePath/Full-Frame and Micro Four Thirds Macro Equivalent Images - Columbine Flower.jpg?width=200 "stereogram]].")
![Housefly on a leaf photographed with a shallow [[depth of field]], noticeable in the blurring in the foreground and the fly's right wing](https://commons.wikimedia.org/wiki/Special:FilePath/Housefly on a leaf crop.jpg?width=200 "Housefly on a leaf photographed with a shallow [[depth of field]], noticeable in the blurring in the foreground and the fly's right wing")
![Macro photograph of a [[fern]] [[sorus]] using [[4:3]] aspect ratio](https://commons.wikimedia.org/wiki/Special:FilePath/Monarch fern sori.jpeg?width=200 "Macro photograph of a [[fern]] [[sorus]] using [[4:3]] aspect ratio")
![A 2019 [[American Silver Eagle]] [[bullion coin]] with a fineness of 999 ('three nines fine'), together with a [[Walking Liberty half dollar]] with a fineness of 900 ('one nine fine').](https://commons.wikimedia.org/wiki/Special:FilePath/2019 American Silver Eagle and 1943 Walking Liberty Half dollar side by side.jpg?width=200 "A 2019 [[American Silver Eagle]] [[bullion coin]] with a fineness of 999 ('three nines fine'), together with a [[Walking Liberty half dollar]] with a fineness of 900 ('one nine fine').")
![Example of a container used for collecting 24-hour urine samples. This particular container is free of [[trace metal]]s to allow for accurate measurement of these substances in urine.](https://commons.wikimedia.org/wiki/Special:FilePath/Trace metal-free 24 hour urine container.jpg?width=200 "Example of a container used for collecting 24-hour urine samples. This particular container is free of [[trace metal]]s to allow for accurate measurement of these substances in urine.")
![agar]], which changes colour based on the bacterial species present](https://commons.wikimedia.org/wiki/Special:FilePath/Urine cultured on Oxoid Brilliance UTI Agar plate.jpg?width=200 "agar]], which changes colour based on the bacterial species present")
Definizione
Wikipedia
Macro photography (or photomacrography or macrography, and sometimes macrophotography) is extreme close-up photography, usually of very small subjects and living organisms like insects, in which the size of the subject in the photograph is greater than life size (though macrophotography also refers to the art of making very large photographs). By the original definition, a macro photograph is one in which the size of the subject on the negative or image sensor is life size or greater. In some senses, however, it refers to a finished photograph of a subject that is greater than life size.
The ratio of the subject size on the film plane (or sensor plane) to the actual subject size is known as the reproduction ratio. Likewise, a macro lens is classically a lens capable of reproduction ratios of at least 1:1, although it often refers to any lens with a large reproduction ratio, despite rarely exceeding 1:1.
Apart from technical photography and film-based processes, where the size of the image on the negative or image sensor is the subject of discussion, the finished print or on-screen image more commonly lends a photograph its macro status. For example, when producing a 6×4-inch (15×10-cm) print using 35 format (36×24 mm) film or sensor, a life-size result is possible with a lens having only a 1:4 reproduction ratio.
Reproduction ratios much greater than 10:1 are considered to be photomicrography, often achieved with digital microscope (photomicrography should not be confused with microphotography, the art of making very small photographs, such as for microforms).
Due to advances in sensor technology, today's small-sensor digital cameras can rival the macro capabilities of a DSLR with a "true" macro lens, despite having a lower reproduction ratio, making macro photography more widely accessible at a lower cost. In the digital age, a "true" macro photograph can be more practically defined as a photograph with a vertical subject height of 24 mm or less.
