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'''Photography''' is the [[art]] or procedure of creating pictures or images by the action of radiant energy (typically visible light) on a sensitive surface such as reactive film. While black and white is still a popular photography choice, today's digital and film photographs are primarily shot in colour. The word photography comes from Greek words and means “drawing with light.”
'''Photography''' is the [[art]] or procedure of creating pictures or images by the action of radiant energy (typically visible light) on a sensitive surface such as reactive film. While black and white is still a popular photography choice, today's digital and film photographs are primarily shot in colour. The word photography comes from Greek words and means “drawing with light.”
[[File:View from the Window at Le Gras by Joseph Nicéphore Niépce.jpg|thumb|right|235px|The first photo ''"View From the Window of Gras"'' by Joseph Nicephore Niepce]]
== History ==
== History ==
[[File:View from the Window at Le Gras by Joseph Nicéphore Niépce.jpg|thumb|right|235px|The first photo ''"View From the Window of Gras"'' by Joseph Nicephore Niepce]]
[[File:200px-Camera obscura box.jpg|thumb|right|235px|Camera obscura]]
Frenchman, '''Joseph Nicephore Niepce''',<ref>[http://niepce.house.museum/ Niepce.house.museum]
Frenchman, Joseph Nicephore Niepce,<ref>[http://niepce.house.museum/ Niepce.house.museum]
</ref> took the first photo in '''1826'''. It was taken in [[Paris]] and was called ''“View From the Window of Gras”''. <ref>[http://books.google.com/books?id=vftTAAAAMAAJ&q=Joseph+Nicephore+Niepce+View+From+the+Window+of+Gras&dq=Joseph+Nicephore+Niepce+View+From+the+Window+of+Gras&client=safari&cd=3 Seizing the Light: A History of Photography] by Robert Hirsch</ref> To achieve this, Joseph Niepce used a Camera Obscura and called the process Heliograph. The process never became practical for everyday use and could not be used for commercial purposes.
</ref> took the first photo in '''1826'''. It was taken in [[Paris]] and was called ''“View From the Window of Gras”''. <ref>[http://books.google.com/books?id=vftTAAAAMAAJ&q=Joseph+Nicephore+Niepce+View+From+the+Window+of+Gras&dq=Joseph+Nicephore+Niepce+View+From+the+Window+of+Gras&client=safari&cd=3 Seizing the Light: A History of Photography] by Robert Hirsch</ref> To achieve this, Joseph Niepce used a Camera Obscura and called the process Heliograph. The process never became practical for everyday use and could not be used for commercial purposes.
Single Shot AF is standard and locks onto the subject until you take the picture. AL Focus is used when you can follow a moving object with the camera with the shutter button pressed half way. At the desired moment you take the photo. The moving object will be in focus. AL Servo shot AF is a combination of the two.
Single Shot AF is standard and locks onto the subject until you take the picture. AL Focus is used when you can follow a moving object with the camera with the shutter button pressed half way. At the desired moment you take the photo. The moving object will be in focus. AL Servo shot AF is a combination of the two.
[[Image:Job In 20110014.jpg|thumb|right|350px|Example of shallow depth of field]]
== Depth of Field ==
== Depth of Field ==
[[Image:Job In 20110015.jpg|thumb|right|350px|Example of extended depth of field (increased sharpness)]]
The area of acceptable sharpness in a photo is know as “Depth of Field”. The Depth of Field is achieved through the size of the lens aperture. The aperture itself can be also be referred to as the iris which is the opening within the lens that the light travels through.
The area of acceptable sharpness in a photo is know as “Depth of Field”. The Depth of Field is achieved through the size of the lens aperture. The aperture itself can be also be referred to as the iris which is the opening within the lens that the light travels through.
The flash intensity can be control on the flash itself although there are some that don’t. The exposure can be also control with the aperture. The larger aperture, the more light enters the camera. This then results in a shallower depth of field.
The flash intensity can be control on the flash itself although there are some that don’t. The exposure can be also control with the aperture. The larger aperture, the more light enters the camera. This then results in a shallower depth of field.
== See also ==
== See also ==
