1. Rule of thirds
   The rule of thirds is a compositional rule of thumb in photography based upon the theory of the golden ratio..
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2. F-number
   In photography the f-number (focal ratio) expresses the diameter of the diaphragm aperture in terms of the effective focal length of the lens..
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3. Angle of view
   In photography, angle of view (also called Angle of Coverage or Field of View) is the amount of a given scene shown on film..
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4. Exposure (photography)
   In photography, exposure is the total amount of light allowed to fall on the film (or electronic sensor in the case of digital photography) during the process of taking a photograph..
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5. Depth of field
   In film and photography, the depth of field is the distance in front of and behind the subject which appears to be in focus..
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6. Aperture
   In photography, the aperture defines the size of the opening in the lens, which in advanced cameras can be adjusted to control the amount of light reaching the film or digital sensor..
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7. Macro photography
   Macro photography is a kind of close-up photography..
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8. 10 Quick Macro Shooting Tips
   Eliminate the variables, and you'll end up with nothing but great shots
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9. Welcome to Photography 101
   An overview of camera types, film types, and a list of suggestions for composing photographs
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