TP-Link VIGI C420I(4mm) 2MP IR Turret Network Camera (PoE) – Full HD 1080p, H.265+, Smart Human/Vehicle Detection, Built-In Mic, 30m Night Vision

The TP-Link VIGI C420I(4mm) is a professional 2MP IR turret network camera designed for reliable 24/7 IP surveillance in business and commercial environments. Built around a Full HD 1920×1080 imaging pipeline, it delivers clear, usable detail for everyday security needs like monitoring shop floors, entrances, hallways, offices, storage rooms, and building lobbies—where stability, consistency, and clean evidence capture matter more than “spec-sheet hype.”

This specific 4mm fixed-lens version is ideal when you want a more concentrated field of view than a wide-angle lens. With a 4mm focal length, the camera is well-suited to watching a doorway, corridor, cashier area, or any space where you need better subject size at typical indoor distances. The 4mm lens provides a 75.2° horizontal field of view (40.8° vertical; 88.3° diagonal), helping you frame the scene with less edge distortion and less “wasted” coverage outside the target area. For practical planning, the DORI distance ratings for the 4mm lens are Detect up to 60m, Observe up to 25m, Recognize up to 12m, and Identify up to 6m—useful guidelines when deciding camera placement and coverage expectations.

Night performance is handled by integrated IR illumination with a rated range up to 30 meters using 850nm infrared. This enables monitoring in low-light or zero-light conditions, such as after-hours offices or dark indoor corridors. The camera also supports Smart IR behavior to help prevent overexposure on subjects that are close to the lens while maintaining visibility on subjects that are farther away. Combined with image enhancement tools like WDR (wide dynamic range) and 3D DNR (digital noise reduction), the C420I is engineered to keep footage readable when lighting conditions are mixed or challenging—such as backlit entrances, bright windows, or uneven indoor lighting.

A key advantage of the VIGI C420I series is its smarter event detection and classification capabilities. The camera supports human and vehicle classification to better distinguish relevant targets from generic motion events. This can reduce false alarms from non-critical movement, making notifications and recorded events more meaningful for daily security operations. In addition, it supports multiple smart detection types, including intrusion detection, line-crossing detection, region entering and region exiting detection, object abandoned and object removal detection, abnormal sound detection, people detection, and vehicle detection. For day-to-day use, that means you can define rules like “notify me when someone crosses this line,” “alert when a person enters this restricted area,” or “flag when an object is removed,” depending on your monitoring needs and the environment.

For recording efficiency and storage optimization, the camera supports modern video encoding including H.265+ / H.265 / H.264+ / H.264 (main stream), and H.265 / H.264 (sub-stream). This allows you to balance image quality and storage consumption more effectively, especially when running multiple cameras on a recorder. The camera provides CBR and VBR bit rate control, and its main-stream bit rate supports 256 Kbps to 4 Mbps, while the sub-stream supports 64 Kbps to 512 Kbps. This flexibility helps you tune the stream for the network environment and recording requirements—whether you prioritize maximum detail or lower bandwidth.

The TP-Link VIGI C420I(4mm) supports dual streaming (main stream and sub-stream) with multiple resolution options. The maximum resolution for this model is 2MP (1920×1080). It supports frame rates up to 25 fps in 50Hz environments and up to 30 fps in 60Hz environments across supported resolutions, making motion smoother for real-world scenes like people walking through entrances. It also supports rotation modes (90°/270°) for corridor-style deployments; note that frame rate may be limited depending on rotation settings.

Audio capture is supported through a built-in microphone, designed to record what is happening near the camera. This can be useful for capturing context in many business cases—such as customer interactions at a counter, activity near an entrance, or unusual sounds after hours. (This is a recording microphone feature; it is not designed for two-way audio communication.)

For installation, the C420I(4mm) supports PoE (Power over Ethernet), which simplifies deployment by carrying power and data through a single Ethernet cable to the camera. This reduces wiring complexity and helps keep installations clean and professional—especially when paired with a PoE switch or a compatible NVR. Network connectivity is via a 10/100M self-adaptive RJ45 Ethernet port with PoE support. The camera supports ONVIF (Profile S), improving compatibility with many standards-based recording and management solutions. It can also be managed through VIGI App, VIGI Security Manager, and a Web UI, supporting remote monitoring workflows for day-to-day operations. The camera includes security features such as HTTPS encryption and access protections to help secure the video system.

Overall, the TP-Link VIGI C420I(4mm) is a practical, business-ready Full HD turret camera built for stable indoor surveillance, smart event detection, efficient recording, and PoE simplicity. If you need dependable 1080p coverage with smart classification and IR night vision—especially in a corridor, doorway, or focused area—the 4mm version is a strong fit.