8MP 4K Security Cameras

Key features at 8MP / 4K

• 3840×2160 native resolution (4K UHD) on most cameras in this range — four times the pixels of a 2MP / 1080p camera.
• AcuSense AI on Hikvision and HiLook models — on-camera classification of people and vehicles versus everything else.
• ColorVu full-colour night vision on supported Hikvision and HiLook models — for night-time identification with colour detail, not just monochrome infrared.
• Strobe & Siren active deterrence on selected Hikvision models.
• H.265+ compression across the modern range — roughly halves the storage cost vs older H.264.
• Turret, dome, bullet and PTZ form factors all available at 8MP.
• PoE 802.3af/at single-cable power and data on all professional models.
• Australian manufacturer warranty — typically 36–60 months depending on brand.

What 4K delivers in practice

4K supports facial identification to roughly 10–12 metres with a 2.8mm wide-angle lens in good light, and number plate identification to roughly 8–10 metres on the same lens. With a longer lens (varifocal 2.8–12mm, or zoom PTZ), you can push those distances out further — at the cost of a narrower field of view per camera.

Compared to 6MP, 4K has about 33% more pixels and a wider 16:9 aspect ratio that suits horizontal scenes (carparks, driveways) better than 6MP's slightly squarer 16:9 / 4:3 sensors. Compared to 2MP, 4K has 4× the pixels (not 16× — that's a common but wrong claim). The trade-off is storage and bandwidth: 4K uses about 2× the storage of 6MP and roughly 3–4× the storage of 2MP for the same retention.

How to choose between cameras at 4K

Four axes, in roughly the order most buyers decide:

1. Brand. Hikvision is the broad range with AcuSense, ColorVu and the longer warranty. HiLook is Hikvision's value sub-brand with 4K options at a lower price (no AcuSense / ColorVu on most models). Axis is the professional / NDAA-compliant option for government and critical-infrastructure work. IDIS is the Korean professional brand with DirectIP zero-configuration and lifetime warranty on many models — also NDAA-compliant.

2. Camera technology. Standard 4K cameras handle "see what happened" reliably. AcuSense earns its keep on outdoor 4K cameras specifically — at this resolution every leaf movement triggers a notification on a standard camera; AcuSense cuts the false-alert noise dramatically. ColorVu for night-time identification where you need colour detail. Strobe & Siren for active deterrence on perimeter zones.

3. Form factor. Turret for general perimeter (the default workhorse). Bullet for long, narrow viewing — driveways, fence lines, plate capture. Dome for discreet indoor or retail. PTZ for actively monitoring large open areas (carparks, yards, multi-zone commercial).

4. Connectivity. PoE wired is the right call for almost every professional install — single Cat6 cable for power and data, no batteries, no Wi-Fi reliability issues. Wi-Fi wireless 4K cameras exist but are uncommon and best suited to specific retrofit cases.

Is 4K the right resolution for you?

4K is the right call when: you've got viewing distances over 8 metres where identification matters, you need to read number plates at distance, the site uses larger displays where lower resolution would look soft, or the use case has forensic / evidence requirements that demand the maximum detail.

4K is overkill when: the viewing distance is under 6 metres, the cameras are interior with controlled lighting and short ranges, or the storage budget is tight — a 4-camera 4K install at 30-day retention needs around 24 TB of HDD. For most residential perimeter coverage, 6MP is plenty and uses about half the storage. For most interior monitoring, 4MP is plenty and uses about a third.

You can mix resolutions on one NVR. Run 4K on the critical zones (driveway entrance, perimeter approaches, carpark) and 6MP or 4MP on the lower-stakes areas (interior, secondary angles). This is the smart cost-saver most buyers don't realise is possible.

Storage and bandwidth at 4K

Rough numbers on H.265+ continuous recording at 4K, full 25 fps:

• Per camera: ~150 GB per day — about 1 TB per 7 days.
• 4-camera 4K system, 30-day retention: ~24 TB — typically 1× 12 TB drive plus 1× 16 TB drive, or 2× 16 TB drives on a multi-bay NVR.
• 8-camera 4K system, 30-day retention: ~48 TB — at this scale, plan for a multi-bay NVR or consider mixing resolutions to keep storage tractable.

Recommended surveillance-grade drives: Seagate SkyHawk AI (8 TB / 16 TB / 24 TB) or WD Purple Pro (8 TB / 14 TB / 22 TB). Desktop drives don't survive the 24/7 write cycle.

Why buy from Security Cameras Australia

• Authorised Australian dealer — genuine 4K cameras across every brand we stock, full manufacturer warranty, not grey import.
• Expert support — pre- and post-purchase technical advice, including resolution-mixing strategy and HDD sizing for 4K systems.
• Price-match guarantee — competitive pricing across the range.
• Free shipping — fast delivery across Australia.
• 30-day returns — a satisfaction guarantee on every camera.

Shop the 4K range

Browse the 4K range below, or talk to us about specifying a system — tell us the viewing distances and the scene you're trying to cover, and we'll confirm whether 4K is right or recommend mixing resolutions for a better cost-to-detail balance.