SDT4E425-8P-GB-APV2 - The panoramic PTZ camera offers ultra-clear images thanks to two 8MP and 4MP sensors with 25x optical zoom and Starlight technology for perfect shots even in low-light conditions. Equipped with AI smart tracking, dual IR illumination and intelligent white light, it guarantees active and color video surveillance with advanced perimeter protection and deterrent audible and light alarms. With video up to 8M@30fps, IP66 protection and ONVIF compatibility, it reduces false alarms, improving security in any context. Dahua
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SDT4E425-8P-GB-APV2 | 8MP + 4MP DUAL RESOLUTION POE OUTDOOR PTZ PANORAMIC CAMERA - 25x OPTICAL ZOOM

The Dahua SDT4E425-8P-GB-APV2 AI-powered PTZ camera provides advanced security with ultra-clear panoramic and detailed images, thanks to Starlight technology, intelligent dual illumination, and advanced auto-tracking. Ideal for video surveillance of large areas with perimeter protection and integrated active alarms, it offers maximum efficiency and savings on installation costs.
Main specifications:
- Dual 8MP + 4MP sensor with 25x optical zoom
- Starlight ultra low-light technology up to 0.005 lux
- Auto-tracking 3.0 with AI smart tracking
- Dual IR illumination and intelligent white light
- IP66 windproof, rainproof and lightningproof protection
Further details

Technical data sheet
Model | SDT4E425-8P-GB-APV2 |
Room | |
Image Sensor | Overview channel: 1/2.7" CMOS; Detail channel: 1/2.8" CMOS |
Pixel | Overview channel: 8MP; Detail channel: 4 MP |
Max. Resolution | Overview channel: 4096 (H) × 1860 (V); Detail channel: 2560 (H) × 1440 (V) |
ROM | Overview channel: 4GB; Detail channel: 4 GB |
RAM | Overview channel: 2GB; Detail channel: 1 GB |
Electronic Shutter Speed | 1 s–1/30,000 s |
Scanning System | Progressive |
Min. Illumination | Channel Overview: 0.005 lux@F1.4 (Color, 30 IRE); 0.0005 lux@F1.4 (B/W, 30 IRE); 0 lux (illuminator on) Detail channel: 0.005 lux@F1.6 (Color, 30 IRE); 0.0005 lux@F1.6 (B/W, 30 IRE); 0 lux (illuminator on) |
Illumination Distance | Channel Overview: 30 m (98.43 ft) (IR); 30 m (98.43 ft) (white light) Detail channel: 100 m (328.08 ft) (IR); 50 m (131.23 ft) (white light) |
Illuminator On/Off Control | Channel Overview: Manual; Auto; Off Detail channel: Zoom Prio; Manual; Auto; Off |
Illuminator Number | Overview channel: 2 (IR light); 2 (White light); Detail channel: 2 (IR light); 2 (Warm light) |
Lens | |
Focal Length | Overview channel: 2.8mm; Detail channel: 5mm–125mm |
Max. Openings | Overview channel: F1.4; Detail channel: F1.6-F3.6 |
Field of View | Overview channel: H: 180°; V: 86°; Detail channel: H: 51.9°–3.0°; V: 39.7°–2.2°; D: 63.1°–3.7° |
Optical Zoom |
Overview channel: NA; Detail channel: 25× |
Focus Control |
Auto; manual; semi-auto |
Close Focus Distance |
Overview channel: 0.6 m (1.97 ft); Detail channel: 0.1 m–0.5 m (0.33"–1.64") |
Iris Control |
Overview channel: NA; Detail channel: Auto; manual; iris first |
PTZ | |
Pan/Tilt Range | Pan: 0° to 360° endless Tilt: –15° to +90°, auto flip 180° |
Manual Speed Control | Pan: 0.1°/s–180°/s; Tilt: 0.1°/s–90°/s |
Preset Speed | Pan: 0.1°/s–180°/s; Tilt: 0.1°/s–90°/s |
Presets | 300 |
Tour |
8 (up to 32 presets per tour) |
Pattern |
5 |
Scan |
5 |
Power-off Memory | Yes |
Idle Motion |
Preset; Pattern; Tour; Scan |
Intelligence | |
IVS (Perimeter Protection) | Tripwire; intrusion; crossing fence detection; loitering detection; abandoned/missing object; fast moving; parking detection; people gathering; human alarm classification; linkage tracking |
SMD | SMD 4.0 |
Active Deterrence | |
Light Warning | Red-Blue light warning; Flash duration: 5 s–30 s; Flash frequency: high, medium, low |
Sound Warning | Offers 11 sound alarms and 10 custom sound alarms can be imported. Sound can be set from 0%–100%. Play times can be set from 1-10. |
Video | |
Compression | Smart H.265+;H.265;Smart H.264+;H.264B;H.264M;H.264H;MJPEG(Sub Stream 1) |
Streaming Capability | 3 Streams |
Resolution |
Overview channel: 8M (4096 × 1860); 2M (2048 × 928); 1080p (1920 × 1080); 720p (1280 × 720); 1024×448; D1 (704 × 576/704 × 480); VGA (640 × 480); CIF (352 × 288/352 × 240); Detail: 4M (2560 × 1440); 3M (2304 × 1296); 1080p (1920 × 1080); 1.3M (1280×960); 720p (1280 × 720); D1 (704 × 576/704 × 480); VGA (640 × 480); CIF (352 × 288/352 × 240) |
Video Frame Rate |
Channel Overview: |
Bit Rate Control | CBR/VBR |
Video Bit Rate | Channel Overview: H264: 128 kbps–16,384 kbps H265: 51 kbps–13,312 kbps; Detail channel: H264: 96 kbps–16,384 kbps H265: 38 kbps–10,240 kbps; |
Day/Night | Overview channel: Auto; Color; B/W; Electronic Detail channel: Auto; Color; B/W; Electronic |
BLC | Yes |
WDR | Overview channel: DWDR; Detail channel: 120 dB |
HLC | Yes |
White Balance | Overview channel: Auto; indoor; outdoor; tracking; manual; sodium lamp; natural light; street lamp Detail channel: Auto; indoor; outdoor; tracking; manual; sodium lamp; natural light; street lamp |
Gain Control | Overview channel: Auto; manual; gain first Detail channel: Auto; manual; gain first |
Noise Reduction | Overview channel: 2D NR; 3D NO Detail channel: Auto: 2D NR; 3D NO |
Motion Detection | Yes |
Region of Interest (ROI) | Yes |
Image Stabilization | Channel Overview: NA Detail channel: Electronic Image Stabilization (EIS) |
Defog | Overview channel: Electronic Detail channel: Electronic |
Digital Zoom | Channel Overview: NA; Detail channel: 16× |
Image Rotation | Channel Overview: NA Detail channel: 180 |
S/N Ratio |
Channel overview: ≥55 dB |
Audio | |
Audio Compression | PCM, G.711A, G.711Mu, G.726, MPEG2-Layer2, G.722.1, G.729 |
Network | |
Network Port | RJ-45 (10XBase-T/100Base-T) |
Network Protocol |
HTTP;HTTPS;TCP/IP;IPv4;RTSP;UDP;SMTP;NTP;DHCP;DNS;DDNS;IPv6;802.1x;SSL;QoS;FTP;UPnP;ICMP;SNMP;IGMP;ARP;RTCP;RTP;PPPoE;RTMP;Bonjour;NFS |
Interoperability | ONVIF (Profile S & Profile G & Profile T);CGI;SDK;P2P |
Streaming Method | Unicast / Multicast |
User/Host | 20 users (total bandwidth: 64M) |
Storage | Micro SD card (512GB); FTP/SFTP; NAS |
Browser | web5.0: IE 9 and later versions; Chrome 41 and later versions; Firefox 52 and later versions; Safari 10 and later versions |
Management Software | DMSS; DSS Pro |
Mobile Client | iOS; Android |
Management Software | DMSS; DSS Pro |
Mobile Client | Android, iOS |
Certification | |
Certifications | CE: EN 50130-4 EN 55032 EN 55035 EN 61000-3-3 EN IEC 61000-3-2 EN 62368-1 |
Port | |
Audio Input |
1 channel (LINE IN, bare wire) |
Audio Output |
1 channel (LINE OUT, bare wire; built-in speaker (mutually exclusive)) |
Alarm Input |
2 (on-off value input: 0–5 VDC) |
Alarm Output |
1 channel |
Alarm Linkage |
Capture; recording; send email; presets; tours; pattern; alarm digital output; audio; warning light |
Alarm Event |
Motion/tampering detection; network disconnection detection; IP conflict detection; memory card state detection; memory space detection |
Alarm Event |
Motion/tampering detection; audio detection; network disconnection detection; IP conflict detection; memory card state detection; memory space detection |
Power | |
Power Supply |
12 VDC, 3 A ± 10%; PoE (802.3at) |
Power Consumption |
Basic: 14 W; |
Power Adapter |
Optional |
Environment |
|
Operating Conditions |
-40°C ~ 65°C (-40°F ~ +149°F) |
Operating Humidity |
≤95% |
Ingress Protection |
IP66; TVS 6000V lightning proof; surge protection; voltage transient protection |
Structure |
|
Product Dimensions |
194.2 mm × 160 mm × 311 mm (7.65" × 6.30" × 12.24") (L × W × H) |
Net Weight |
3.1 kg (6.83 lb) |
Gross Weight |
4.6 kg (10.14 lb) |