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Varifocal Lens

Varifocal Lens - This lens allows the user/installer to manually adjust the camera's field of view. Varifocal lenses can therefore be changed to provide wider viewing angles or narrower telephoto viewing angles. Because of their adjustability, varifocal lenses are great when a camera will serve more than one purpose or to ensure proper focus without first determining an exact fixed lens focal length. Varifocal lenses are also typically referred to as zoom lenses.

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Video Motion Detection

Video Motion Detection is an advanced software feature of DVRs which can detect motion in a camera's field of view and begin recording based on this motion detection. This is an advanced software feature which can detect motion in a camera's field of view and begin recording based on this motion detection. This type of detection can in most cases be adjusted in sensitivity. As well, a user can select and deselect areas in each camera's view for motion detection function.

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