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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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 Lights 2.0 Lux
Clear Full Moon 0.1 Lux
Moonlight Cloudy Night 0.01 Lux
Moonless Starry Night 0.001 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
Infinity Scroll Image - Automatic Network Replenishment (ANR) Technology V3


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
Image Sensor 1/2″ CMOS
Effective Pixels 3840(H)×2160(V), 8MP
Scanning System Progressive
Electronic Shutter Speed PAL: 1/4s ~ 1/100,000s
NTSC: 1/3s ~ 1/100,000s
Minimum Illumination 0.005 Lux / F1.6, 30IRE, 0 Lux IR on
S/N Ratio More than 65dB
IR Distance Up to 131 feet
IR On/Off Control Auto / Manual
Lens Type Fixed Lens / Fixed Iris
Mount Type Board-in
Focal Length 2.8mm
Max Aperture F1.6
Angle of View 110.8°
Focus Control N/A
Close Focus Distance 70.87”
DORI Distance
DORI Distance Detect: 276ft, Observe: 112ft, Recognize: 56ft, Identify: 26ft
Pan / Tilt / Rotation
Pan / Tilt / Rotation Pan: 0° ~ 360°, Tilt: 0° ~ 90°, Rotation: 0° ~ 360°
Resolution 8MP (3840×2160)
Frame Rate 15fps @ 4K, 20fps @ 6MP, 25/30fps @ 4MP
Video Output 1-channel BNC high definition video output / CVBS video output (DIP switch)
Day/Night Auto (ICR) / Manual
OSD Menu Multi-Language
WDR 120dB
Gain Control AGC
Noise Reduction 2D / 3D
White Balance Auto / Manual
Smart IR Auto / Manual
Certifications CE (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 Interface 1ch in & Built-in Mic
Power Supply 12V DC ±30% (It is recommended to use a power adapter to supply the power for one camera)
Power Consumption Max 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 Resistance IP67
Casing Aluminum
Dimensions 7.08″ × 2.76″ × 2.76″
Net Weight 0.93lb
Gross Weight 1.17lb
Product Specific Resources

Data Sheet – HDCB4K-28A

03/03/2022 PDF
Additional resources

What is Infrared, Starlight, and Full Color

Web Page

Armor Dome Cameras

Web Page

Coax Based Video Analytics

Web Page

Bracket Compatibility

Web Page

Marketing Collateral

Web Page

Video Monitoring Solutions

Web Page

Optiview VMS

Web Page

Optiview VMX

Web Page

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%
Product Series



Camera Types / Style

Additional Features


Lens Type

Max IR Distance

Minimum Color Illumination

Weatherproof Rating

Max Angle of View


Wide Dynamic Range

SKU: HDCB4K-28A Category: