HDCB4K-28A – 4K Wide Angle HD-over-Coax Bullet Camera

4K / 8 Megapixel
2.8mm Fixed Lens
131ft IR Range
Built-in Mic

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CATEGORIES: 8MP / 4K Security Cameras
HD-over-Coax CCTV Security Camera
4K Over Coax

Capture HD video footage with 8MP HD-Over-Coax 2.8MM variable focus lens with a maximum aperture of F1.6.

Starlight Technology

Advanced Starlight technology with a minimum of 0.005 LUX before IR turns on.

Optiview Security Camera Angle of View
110° VIEW

Capture even more with an wide angled 110° view with no distortion.

Outdoor Weatherproof IP Rating

All metal aluminum housing for indoor and outdoor installations.

Built-In Mic
Built-In Mic

The HDCB4K-28A comes with a built in microphone to help you get even more data from every device.

Infinity Scroll Image - Starlight V2


TheHDCB4K-28A is capable of producing a stunningly clear, colorful video with low illuminance enhancement for darker environments using starlight technology. Once the environment gets down below 0.005 LUX, this camera’s on board IR illumination kicks in. This enables clear video capture in both day and night with high definition video output.

Light Level
Lux Rating
Security / Outdoor Lights2.0 Lux
Clear Full Moon0.1 Lux
Moonlight Cloudy Night0.01 Lux
Moonless Starry Night0.001 Lux

Long Distance Transmission

HDCVI technology guarantees real-time transmission at long distance without any loss. It supports up to 2296 ft for 5MP HD video via coaxial cable, and up to 984 ft via UTP cable.

Infinity Scroll Image - Extended PoE (ePoE) & Ethernet of Coax (EoC) V1
Built-In Mic - Infinity Scroll

Built-In Audio

The HDCD4K-28A comes with a built-in mic to help give you even more protection than a traditional still video.


3D NR is noise reduction technology that detects and eliminates random noises by comparing two sequential frames. Optiview’s advanced 3D NR technology allows remarkable noise reduction with little impact to sharpness, especially under limited lighting condition. This decreases bandwidth and saving storage space.

4K Resolution

4K resolution captures images four times the pixel density of 1080P which means that the finer details, such as faces or smaller items can be viewed with more detail than traditional 1080P surveillance.

Infinity Scroll - HD Resolutions
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HDCVI technology supports 4 signals to be transmitted over 1 coaxial cable simultaneously, i.e. video, audio, data and power. Dual-way data transmission allows the HDCVI camera to interact with the DVR, such as sending control signal or triggering alarm. HDCVI technology supports PoC for construction flexibility.


The camera achieves vivid images, even in the most intense contrast lighting conditions, using industry-leading wide dynamic range (WDR) technology. For applications with both bright and low lighting conditions that change quickly, True WDR (120 dB) optimizes both the bright and dark areas of a scene at the same time to provide usable video.

WDR (Wide Dynamic Range) - Infinity
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Built for endurance, this all metal housing is rated IP67, which means it is protected from water and dust. Mount this camera anywhere with its 3-axis cable management bracket. Additional junction boxes and brackets are available for additional installation options, and help further protect your cables and connections.

Remote Video Surveillance

Optiview’s powerful video management software allows clients to monitor a live view of their remote security cameras when they are off-site. The on-site DVRs and NVRs can be set up to send alerts to you, the user, when activity is present that allows the user to log-in to live-stream their surveillance system. Equally as important, the remote monitoring software allows Clients to remotely access recorded video and playback without having to be present where the system is located. Now more than ever, the ability to monitor your residential or commercial sites without being physically present is a huge benefit of Optiview’s video management software platforms.

Remote Video Surveillance - Infinity Scroll

Get stunning clarity in your surveillance footage with full, 4K over coax cameras from Optiview. The HDCB4K-28A mini bullet camera comes with a wide angle 2.8mm lens and built in audio.

  • Starlight, 120dB True WDR, 3DNR
  • Max. 4K resolution
  • HD/SD switchable
  • Audio in interface, built-in mic
  • 2.8mm fixed lens
  • Max. IR length 131ft, Smart IR
  • IP67, DC12V±30%
Image Sensor1/2″ CMOS
Effective Pixels3840(H)×2160(V), 8MP
Scanning SystemProgressive
Electronic Shutter SpeedPAL: 1/4s ~ 1/100,000s
NTSC: 1/3s ~ 1/100,000s
Minimum Illumination0.005 Lux / F1.6, 30IRE, 0 Lux IR on
S/N RatioMore than 65dB
IR DistanceUp to 131 feet
IR On/Off ControlAuto / Manual
Lens TypeFixed Lens / Fixed Iris
Mount TypeBoard-in
Focal Length2.8mm
Max ApertureF1.6
Angle of View110.8°
Focus ControlN/A
Close Focus Distance70.87”
DORI Distance
DORI DistanceDetect: 276ft, Observe: 112ft, Recognize: 56ft, Identify: 26ft
Pan / Tilt / Rotation
Pan / Tilt / RotationPan: 0° ~ 360°, Tilt: 0° ~ 90°, Rotation: 0° ~ 360°
Resolution8MP (3840×2160)
Frame Rate15fps @ 4K, 20fps @ 6MP, 25/30fps @ 4MP
Video Output1-channel BNC high definition video output / CVBS video output (DIP switch)
Day/NightAuto (ICR) / Manual
OSD MenuMulti-Language
Gain ControlAGC
Noise Reduction2D / 3D
White BalanceAuto / Manual
Smart IRAuto / Manual
CertificationsCE (EN55032, EN55024, EN50130-4)
FCC (CFR 47 FCC Part 15 subpartB, ANSI C63.4-2014)
UL (UL60950-1+CAN/CSA C22.2 No.60950-1)
Audio Interface1ch in & Built-in Mic
Power Supply12V DC ±30% (It is recommended to use a power adapter to supply the power for one camera)
Power ConsumptionMax 6.8W (12V DC, IR on)
Operating Conditions-22°F ~ +140°F / Less than 90% RH
Storage Conditions-22°F ~ +140°F / Less than 90% RH
Ingress Protection & Vandal ResistanceIP67
Dimensions7.08″ × 2.76″ × 2.76″
Net Weight0.93lb
Gross Weight1.17lb
Product Specific Resources

Data Sheet – HDCB4K-28A

Additional resources

What is Infrared, Starlight, and Full Color

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Coax Based Video Analytics

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Bracket Compatibility

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Marketing Collateral

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Lens Type