Reolink CX820 4K PoE Dome Camera 8MP 3840x2160 F1.0 1/1.8" IP67 White

4K HDR Dome Camera for Outdoor Surveillance

The Reolink CX820 is an 8MP dome camera that captures 3840x2160 video with HDR for balanced highlights and shadows. It uses a 1/1.8" sensor paired with an F1.0 aperture to gather significantly more light than F2.0 alternatives. Built for wall or ceiling mounting, the IP67-rated housing withstands dust and rain for reliable outdoor deployment. Power and data run over a single RJ45 PoE connection.

Upgrade from Lower-Resolution

This unit replaces cameras limited to 1080p or sensors that struggle after dark. The jump is worth it when you need identifiable 4K detail across a wide area and true colour footage in near darkness without relying on auxiliary illuminators. The F1.0 aperture and 1/1.8" sensor combination delivers that low-light performance natively. Buyers who only need basic motion alerts in well-lit zones may not require this level of sensitivity.

Practical Limits of PoE and Local Storage

The single RJ45 port carries both power and network traffic, so cable runs must stay within standard Ethernet distance limits and the switch or injector must supply sufficient PoE power. ONVIF support allows integration with compatible NVRs, yet the camera itself offers no pan, tilt or zoom adjustment after mounting. Local recording tops out at a 256GB microSD card, capping standalone retention time.