Q: What does the focal length (in millimeters) determine? 4/26/2006
A: The focal length determines what you will see on the monitor. This is called Field of View and is expressed in degrees. Example: A 4mm 1/3" lens will give you 63 degree of horizontal field of view; an 8mm 1/3" lens will give you 34 degree field of view.
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A: The focal length determines what you will see on the monitor. This is called Field of View and is expressed in degrees. Example: A 4mm 1/3" lens will give you 63 degree of horizontal field of view; an 8mm 1/3" lens will give you 34 degree field of view.
