Certified Professional Photographer (CPP) Practice Exam

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According to the Sunny 16 rule, what is the starting exposure on a sunny day?

  1. F8 @ 1/ISO

  2. F11 @ 1/ISO

  3. F16 @ 1/ISO

  4. F5.6 @ 1/ISO

The correct answer is: F16 @ 1/ISO

The Sunny 16 rule is a guideline for photographers that helps to determine correct exposure settings in bright sunlight conditions. It suggests that on a clear, sunny day, the correct exposure is achieved with an aperture of f/16 and a shutter speed of 1/ISO for the film speed or sensor sensitivity being used. This means that if you are using ISO 100, your settings would be f/16 at 1/100 second. In this case, f/16 is used as a starting point because the rule is based on the amount of light available in bright sunlight, which reaches an intensity that allows for this aperture to provide a balanced exposure. As light conditions change, photographers can adjust their aperture and shutter speed accordingly while maintaining the correct exposure.