Cascadia Digital video recorder Manuel d'utilisateur télécharger pdf (Page 43)

CCTV Glossary

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Z. - In electronics and television this is usually a code for impedance.

Zoom lens. - A camera lens that can vary the focal length while keeping the object in focus, giving

an impression of coming closer to or going away from an object. It is usually controlled by a

keyboard with buttons that are marked zoom-in and zoom-out.

Zoom ratio. - A mathematical expression of the two extremes of focal length available on a

particular zoom lens.

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Cascadia Digital video recorder Manuel d'utilisateur Page 43