A varifocal lens is a camera lens with variable focal length in which focus changes as focal length (and magnification) changes, as compared to a parfocal ("true") zoom lens, which remains in focus as the lens zooms (focal length and magnification change).
BLC, HLC, and WDR are three settings that affect the way a security camera adjusts the exposure of the image. BLC and HLC compensate for uneven lighting via digital adjustments, whereas WDR uses the camera's hardware to provide even lighting across the scene.
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27 сен 2022
