What's the difference between optical and digital zoom on PTZ cameras?
Optical zoom uses glass lens elements to magnify without loss of detail; digital zoom crops and enlarges pixels post-capture, introducing blur and artifacts. Always rely on optical zoom for identification-critical surveillance. A 30x optical PTZ is superior to 30x optical + 10x digital for forensic use.
How much power do PTZ cameras actually draw?
Compact PTZ: 30–45W; mid-range: 45–65W; large zoom units with heaters/wipers: 70–90W+. Standard PoE (15W) is insufficient; use PoE+ (30W) or high PoE switches. PoE budget planning prevents mid-deployment power failures.
Can I control PTZ cameras remotely via smartphone or web client?
Yes. Most PTZ cameras support RTSP/ONVIF protocols and ship with mobile apps (iOS/Android) and web dashboards for joystick-style pan/tilt/zoom control and preset recall. Verify ONVIF Profile S support for standards-based integration with third-party NVRs.
What's the typical pan/tilt speed, and why does it matter?
Pan/tilt speed ranges from 10°/sec (slow, preset-based deployments) to 90°/sec+ (rapid threat response). Faster speeds (60°+/sec) are critical for active threat tracking; slower units suit automated patrol cycles. Pair with incident response strategies to ensure operator can reach target in time.
How do I choose between 4MP, 8MP, and high-resolution PTZ?
4MP suits 100–300 ft ranges; 8MP extends to 300–800 ft; 12MP+ for 800+ ft forensic identification. DORI distance math + your actual zoom requirement dictates choice. Over-specifying resolution wastes NVR throughput; under-specifying fails forensic needs.
Should I pair PTZ with thermal imaging?
Yes, if 24/7 detection matters (fog, rain, darkness) or perimeter intrusion detection is critical. Thermal PTZ cameras detect humans/vehicles independent of lighting; pair with visible-spectrum PTZ for daytime identification. Budget separate NVR lines to avoid throughput saturation.
