Hikvision 2 MP Fixed Dome Network Camera DS-2CD3121G2E-I (2.8 mm)

The DS-2CD3121G2E-I is a Hikvision 2 MP fixed-lens dome network camera with a 2.8 mm lens, built around IR night vision and H.265+ compression for dependable everyday coverage.

• High quality imaging with 2 MP resolution
• Support Human and Vehicle Detection
• Clear imaging even with strong back lighting due to DWDR technology
• Efficient H.265+ compression technology
• EXIR 2.0: advanced infrared technology with long IR range
• Water and dust resistant (IP67) and vandal resistant (IK08)

Where it fits

Positions with a settled scene: entrances, rooms, shop floors and lobbies, where a wide angle covers the space from a corner. A fixed lens has nothing to drift out of focus and costs less than a varifocal.

Where it is the wrong choice: long-distance identification at a gate or fence line — a varifocal model fits better.

Before you order — three things to confirm

• The angle you need. Per the datasheet: 2.8 mm, horizontal FOV 104.9°, vertical FOV 58.3°, diagonal FOV 123.3° 4 mm, horizontal FOV 81.3°, vertical FOV 43.7°, diagonal FOV 96.9°. Send us the mounting height, the distance to the far edge of the scene and the width to cover, and we check the lens before ordering.
• Recorder and resolution. Confirm the NVR accepts 2 MP network cameras with H.265+, and that its bandwidth and disk space still meet your retention period with this channel added.
• Power and mounting. Power per the datasheet: 12 VDC ± 25%, 0.4 A, max. 5 W,Ø5.5 mm coaxial power plug,reverse polarity protection, PoE: IEEE 802.3af, Class 3, max. 6. Protection: IP67: IEC 60529-2013,IK08: IEC 62262:2002. Plan a PoE switch or NVR port and the bracket for the mounting surface.

Technical specifications

• Manufacturer: Hikvision
• Model: DS-2CD3121G2E-I
• Lens (this listing): 2.8 mm
• Image Sensor: 1/2.9″ Progressive Scan CMOS
• Max. Resolution: 1920 × 1080
• Min. Illumination: Color: 0.01 Lux @ (F2.0, AGC ON), B/W: 0 Lux with IR
• Angle Adjustment: Pan: 0° to 355°, tilt: 0° to 75°
• Lens Type: Fixed focal lens, 2.8 and 4 mm optional
• Focal Length & FOV: 2.8 mm, horizontal FOV 104.9°, vertical FOV 58.3°, diagonal FOV 123.3° 4 mm, horizontal FOV 81.3°, vertical FOV 43.7°, diagonal FOV 96.9°
• Lens Mount: M12
• Iris Type: Fixed
• Aperture: F2.0
• Supplement Light Type: IR
• Supplement Light Range: Up to 40 m
• Smart Supplement Light: Yes
• IR Wavelength: 850 nm
• Main Stream: 50 Hz: 25 fps (1920 × 1080, 1280 × 720) 60 Hz: 30 fps (1920 × 1080, 1280 × 720)
• Sub-Stream: 50 Hz: 25 fps (640 × 480, 640 × 360) 60 Hz: 30 fps (640 × 480, 640 × 360)
• Video Compression: Main stream: H.265+/H.265/H.264+/H.264, Sub-stream: H.265/H.264/MJPEG
• Ethernet Interface: 1 RJ45 10 M/100 M self-adaptive Ethernet port
• Power: 12 VDC ± 25%, 0.4 A, max. 5 W,Ø5.5 mm coaxial power plug, reverse polarity protection, PoE: IEEE 802.3af, Class 3, max. 6.5 W
• Material: Base: Metal, cover: Plastic
• Dimension: Ø110,8 mm × 84.7 mm (Ø4.4″ × 3.3″)
• Storage Conditions: -30 °C to 60 °C (-22 °F to 140 °F). Humidity 95% or less (non-condensing)
• Startup and Operating Conditions: -30 °C to 60 °C (-22 °F to 140 °F). Humidity 95% or less (non-condensing)

Figures from Hikvision’s published datasheet. We confirm the revision in stock when we quote.

Common questions

Will it work with my existing recorder?
It works with Hikvision NVRs that support 2 MP network cameras. For an older Hikvision recorder or a third-party system, send us the model and firmware and we confirm compatibility before ordering.

How far does it see at night?
The datasheet gives a supplement light range of up to 40 m. Real distance depends on the scene and on reflective surfaces.

Genuine stock from the authorized Hikvision agent in Egypt, official warranty of 1 to 5 years depending on the product, delivery across Egypt, and professional installation in Cairo & Giza, priced after a site assessment. Prices are given on request — press Get a Quote on this page or call 16454.