Dahua DH-SD3E410DB-GNY-A-PV1 PTZ IP camera 4 MP, 10× zoom, IR 70 m, PoE

A turret-style PTZ camera is smaller than a classic large PTZ dome, yet it can pan, tilt and zoom in the same way. The 10× optical zoom brings a distant person or car closer without losing image quality, unlike digital zoom, which simply stretches the pixels. The 1/2.8″ CMOS sensor delivers a 4 MP picture at 2560 × 1440 and up to 25/30 frames per second.

In the dark the IR illumination switches on, reaching up to 70 m and producing a black and white image. When a colour night picture is needed, the camera uses its warm light at up to 30 m, so the recording shows the colours of clothing and cars, which is important information when an incident is investigated later. That way both the far end of the site and the nearby entrance are covered.

The camera does not just record an event, it can respond to it. The red and blue warning light gives an intruder a clear signal that the area is guarded, and two-way talk lets the owner or a guard speak directly to whoever is on site. Often that is enough for an unwanted visitor to realise they are being seen and heard.

SMD 3.0 is smart motion detection that focuses on people and vehicles, so tree shadows and rain do not trigger a notification every time. Perimeter protection watches defined lines and zones, and face detection marks faces in the footage, which makes finding the right moment in a recording faster.

The housing is rated IP66, and the camera operates from –30 to 60 °C at up to 95% relative humidity. It is designed for ceiling mounting, weighs 1.58 kg and measures 151.8 × 142.6 × 236.2 mm. Power can come via PoE over the same network cable that carries the video, or from a separate DC adapter. There is no Wi-Fi: the connection is wired, which is more dependable in a security system.

Company yards, car parks, storage areas and larger private properties where one pan-tilt camera has to cover several directions and zoom in when needed. The warning light and two-way talk suit places where theft or vandalism should be prevented rather than just reviewed on a recording afterwards. The compact turret body is easier to install than a large PTZ dome.