Monthly Archives: March 2017

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PTZ, Focal length and Field of view

Category : Uncategorized

Pan – The movement of a camera in the horizontal direction or x-axis.

Tilt – The movement of a camera in the vertical direction or y-axis.

Zoom – Enlarge or reduce the focus by changing of the effective focal length thus allowing many fields of view. It can be an optical zoom where adjustments are made to the lens or it can be a digital zoom whereby we electronically magnify a select portion of the view.

Focal Length – This is the distance from the optical center of a lens to the image of an object located at an infinite distance from the lens. Long focal lengths give a small field of view and vice versa.

Field of View – This is the measure of the visible area within the camera’s field of view. The larger the focal length, the smaller the field of view and vice versa.