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Creative Glossary > Film > F Stop
Term Details
Term: F Stop
Subcategory: General
Definition: A scale that measures the size of the opening of the iris on a camera’s lens.  When one opens the iris wider, more light is allowed to expose the film.  Closing the iris permits a less amount of light to enter the camera.  The smaller the number of the f-stop, the wider is the opening of the iris (and vice versa).  A standard f-stop scale is 1.4 - 2 - 2.8 - 4 - 5.6 - 8 - 11 - 16 – 22.

 

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