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A motorised varifocal lens is the practical solution for camera positions where the required field of view cannot be determined precisely before installation: the camera is mounted, cabled, and powered, and the lens is then adjusted from the DVR’s camera management menu to the correct zoom level and focus for the specific installation position. This remote adjustment is particularly valuable for cameras mounted at height where physical access requires a ladder, for cameras inside enclosures, and for positions where fine-tuning the coverage angle is expected during site commissioning.
The lens typically covers a zoom range such as 2.7mm to 12mm, allowing the camera to be configured anywhere between a wide-angle view for large area coverage and a more telephoto view for a narrower, more detailed field at greater distance.
Starlight technology provides colour imaging in very low light conditions where standard CCTV cameras would produce monochrome output, maintaining colour detail in the early morning and evening hours and in poorly lit external areas.
The built-in microphone captures audio at the camera position, enabling audio recording alongside video for DVRs that support audio recording. Audio adds valuable context to video evidence in commercial and residential security recordings.
For CCTV installers specifying 5MP Starlight HDCVI cameras where remote lens adjustment is needed after installation across London and the UK, the HAC-HDW2501T-Z provides the motorised varifocal option with the Starlight and audio specification.
Key Features
- Motorised varifocal lens: adjust zoom and focus remotely from the DVR
- 5MP Starlight for colour imaging in very low ambient light
- Built-in microphone for audio recording alongside video
- HDCVI: connects to Dahua CVI DVR over standard coaxial cable
- Remote lens adjustment avoids physical camera access for coverage optimisation
- IR illumination for monochrome night vision when ambient light is absent
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