DAHUA DH-IPC-HFW2849T-AS-IL (8 MP/3.6 MM) - PoE IP CAMERA

Smart Dual Light: 60 metres of infrared and 50 metres of warm white

The -IL suffix in DH-IPC-HFW2849T-AS-IL stands for Smart Dual Light, and it describes two independent light sources inside one housing: an infrared array reaching about 60 metres and a warm white LED that covers roughly 50. Which one fires is decided by the analytics rather than by a timer — an empty scene stays lit by invisible IR so the camera draws no attention, and the moment the algorithm classifies a person or a vehicle the white LED switches on and the recording turns from monochrome into full colour. That is the difference between a log line saying motion was detected at the gate at 02:40 and a clip showing a beige jacket, a blue rucksack and a silver hatchback with a black roof. Three illumination modes are available and the choice is a practical one: forced IR keeps you on good terms with neighbours whose windows face the camera, permanent white light gives round-the-clock colour on a driveway, and the automatic mode is the sensible middle ground for a yard. There is a downside people usually discover after installation — warm light attracts insects, and a moth half a metre from the lens reads as a large moving object, so avoid mounting the camera right next to a street lamp or under eaves where midges gather.

Eight megapixels, a 3.6 mm lens and the actual DORI distances

The 1/2.7-inch 8 MP sensor produces a 3840x2160 frame, four times the pixel count of an ordinary 2 MP camera, and that headroom is what lets you zoom into a region of the recording afterwards instead of guessing at a smudge. At 3.6 mm the lens covers 87 degrees, deliberately narrower than the common 2.8 mm option: the camera does not try to swallow a whole yard at once but holds an elongated sector — a driveway, a path, an aisle between shelves — and keeps detail readable much deeper into the frame. Dahua publishes DORI figures for exactly this version: detection at 98.7 m, observation at 39.5 m, recognition of a familiar person at 19.7 m and identification of a stranger at 9.9 m. Take those numbers literally — at forty metres you will see that someone is walking and in which direction, but if a face has to be identified, the choke point (a wicket gate, a doorway, a till) belongs closer than ten metres to the lens. One more detail rarely printed on a product card: full 8 MP is delivered at 20 frames per second, while the familiar 25 fps is available in the 2688x1520 mode, so for areas with fast movement — a car leaving a gate, a narrow passage, a checkout zone — it is smarter to drop the resolution on purpose and gain a smoother stream.

WizSense and SMD Plus: alerts for people, not for branches

This is a WizSense 2 Series camera, which means the analytics run on the camera's own processor rather than on a recorder or in a cloud service, and an object is classified before the event ever becomes a notification. SMD Plus separates people and vehicles from the rest of the moving clutter: branches in the wind, cloud shadows, rain lit up by the illuminator and a cat on the fence stop being a reason for a push at three in the morning. IVS rules sit on top of that — tripwire and intrusion with filtering by object type — so an event can be described precisely as "a person crossed the fence line inwards" instead of "something changed in the frame". The AS index in the model name means the pigtail carries audio and alarm inputs and outputs alongside the network socket: an external microphone or a loudspeaker, a reed switch on the gate or an IR beam barrier can be wired in, and the output is able to trigger a siren or a lighting relay, which turns the camera into a participant in the scenario rather than a passive observer. Compare that with models without built-in classification: they react to any change of pixels, the owner mutes the notifications within a week, and the system quietly degrades from security to archive.

Power, metal and frost: what matters when mounting outdoors

Power is dual: either 12 V from a local adapter or PoE 802.3af over the same twisted pair that carries the video, which on site means one cable run instead of two and backup for the whole system from a single UPS in the rack rather than eight adapters around the perimeter. Consumption of 8.3 W (around 0.7 A) is among the highest of the 8 MP Dahua models in this catalogue, and that shows up in planning: eight of these cameras draw close to 66 W, so a switch with a 60 W total PoE budget is already out of the question and you need one with headroom. The metal housing rated IP67 gives complete dust protection and resistance to powerful water jets, which in practice allows an exposed facade with driving rain rather than only a spot sheltered by a cornice. The operating range of -40 to +60 °C is specified with margin for a Ukrainian winter, where budget cameras rated from -10 °C frequently refuse to boot in January after an overnight power cut until the air warms up. At 238.5 mm and 720 g this is a full-size bullet on a bracket: it is clearly visible from a distance and that visibility deters by itself, but below three metres such a body can be twisted aside by hand, so mount it higher or consider a dome instead.

Storage: memory card, recorder and how many days actually fit

The camera takes a microSD card of up to 256 GB, which is not a replacement for a recorder but an insurance policy: if someone cuts the power to the house or severs the network cable in the evening, the last hours of footage still live inside the camera. The permanent archive belongs on an NVR all the same — streams are published over ONVIF, and CGI, FTP/SFTP and P2P are supported too, so the camera attaches both to the Dahua recorders in this catalogue and to third-party video management systems. Rough arithmetic for planning: one 8 MP camera in H.265 at a moderate bitrate consumes roughly 60-80 GB per day of continuous recording, so four of them on a 4 TB drive last about two weeks. If a month of depth is required, either budget for an 8 TB disk or move part of the channels to event-based recording, which works reliably precisely because WizSense events are real rather than "a branch moved". If the recorder has not been bought yet, look at models with built-in PoE such as the eight-channel DHI-NVR1108HS-8P-S3/H: versions without PoE require a separate switch, and that is the budget line people remember only after the cable is already pulled.

Where this camera belongs and what it is built for

A 3.6 mm lens makes this a directional camera rather than an overview one: its natural places are the entrance group and the approach drive, a long side passage between the house and the fence, a warehouse aisle, a shop floor stretched in length. Those are the scenes where the combination of a narrower angle and long-range illumination pays off: a person entering the sector thirty-five to forty metres out is caught by the white light and recorded in colour instead of emerging from the dark five metres from the door. For covering a wide square yard with a single unit this model is the weaker choice — the 2.8 mm version is more logical there, and 3.6 mm makes sense as its partner: the wide lens takes the general view while the narrow one holds the gate. In a small room with a low ceiling sixty metres of illumination has nowhere to go: the light bounces off the nearest wall, blows out the centre of the frame and leaves the corners dark. Nor should you count on reading the plate of a moving car — that needs longer optics and a dedicated shutter setup, while this camera will give you a plate only on a slow entry within a dozen metres.

How it differs from neighbouring Dahua models in this catalogue

The closest relative is the DH-IPC-HFW2849S-S-IL: the same 8 MP sensor and the same Smart Dual Light, but with a 2.8 mm lens and a wider angle, illumination limited to 30 metres and a housing without audio or alarm terminals. For a compact yard or a porch some fifteen metres deep that junior model covers the task completely and the extra paid for long-range light and AS connectors is wasted; on a stretched plot, or where a siren and a gate reed switch have to be wired in, the difference earns its keep from the first month. The DH-IPC-HFW2849TL-S-PRO is also 8 MP at 3.6 mm with 50 metres of illumination, yet its product card claims no human/vehicle classification, so you get a picture of the same class without intelligent filtering of alerts. If the same feature set is needed in an impact-resistant body, look at the domes DH-IPC-HDBW2849E-S-IL at 8 MP and DH-IPC-HDBW2449E-S-IL at 4 MP — they are less conspicuous and protected against an attempt to knock the camera off, although their illumination reaches less far. And the honest advice in the opposite direction: if all you need is general control of a yard and you never plan to study faces, the 2 MP DH-IPC-HFW2249S-S-IL keeps both the colour night and the object-type filtering in a noticeably more affordable package.

Tell us the length of the plot, the mounting height and what exactly has to be visible in the frame, and we will advise how many cameras are needed and where 3.6 mm should give way to a wider lens.