Reciprocity

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Reciprocity

• Is a photographic theory that states
• that they are many different combinations of
  balanced exposures.

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Reciprocity

• is
• Equal Balance Exposures
• We refer to these equal balanced exposures as
• gt Equivalents lt

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Review
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Equivalents

• Example
• Balanced Exposure f/5.6 _at_ 1/125
• f/2.8 _at_ 1/500
• f/4 _at_ 1/250
• f/5.6 _at_ 1/125
• f/8 _at_ 1/60
• f/11 _at_ 1/30

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• All of the above shutter speed and f/stop
  combinations would be equivalent exposures and
  would result in balanced exposures for the
  subject being photographed.

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Equivalents

• Quiz
• f/2 _at_ 1/1000
• f/___ _at_ 1/___
• f/4 _at_ 1/250
• f/___ _at_ 1/___
• f/8 _at_ 1/60

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Equivalents

• Answers
• f/2 _at_ 1/1000
• f/2.8 _at_ 1/500
• f/4 _at_ 1/250
• f/5.6 _at_ 1/125
• f/8 _at_ 1/60

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Why Do We Practice

• Reciprocity
• ?

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Equivalents

• Which Shooting Mode Do You Use?
• Manual (gives you full control but do you need
  it?)
• Shutter Priority (TV)
• Aperture Priority (AV)

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Equivalents

• Manual Mode
• allows you to control both
• Movement and Depth of Field freely without
  having to switch shooting modes.

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Equivalents

• Aperture Priority Mode
• allows you to control
• Depth of Field
• by choosing the f/stop you wish to shoot at and
  the camera will choose the correct shutter speed
  to give you a balanced exposure.

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Equivalents

• Shutter Priority Mode
• allows you to control
• Movement
• by choosing the shutter speed you wish to shoot
  at and the camera will choose the correct f/stop
  to give you a balanced exposure.

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Equivalents

• Both Shutter Priority
• Aperture Priority Shooting Modes
• make it easier to do equivalents so we can take
  advantage of the creative controls that our
  cameras allow us to do!