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Presentation used to help explain f-stop to students.
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Understanding F-Stops
How much light is allowed to enter through the lens.
How much is in focus. It controls the Depth of Field in the Image. (DOF)
F-Stops control 2 Things
F-stops are the opening on the lens.
There are numbers on the lens that correspond to the openings on the lens.
Most common F-stops are
22 16 11 8 5.6 3.5 2 1.4
(these are the ones you will see on tests)
The Depth of Field refers to the plane of focus.
What is an F-Stop
22 16 11 8 5.6 3.5 2 1.4
The Larger the number the smaller the opening the larger the Depth of
Field.
The Smaller the number the larger the opening the smaller the Depth of
Field.
Large Depth of FieldSmaller the Opening More is in Focus
Small Depth of Field
Larger the opening, less
that is in focus
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