If you’re choosing cameras in 2026, the real comparison most Aussie homeowners make isn’t 4MP vs 8MP anymore. It’s 6MP vs 8MP—because these are the popular “sweet spot” options in modern CCTV kits.
Here’s the honest verdict:
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6MP is the best all-rounder for most Australian homes. It gives excellent detail without blowing up storage and bandwidth.
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8MP (4K) is worth it when you need to cover wide areas at distance and still want to zoom in after the fact (long driveways, wide frontages, larger blocks, carpark-style views).
And one more truth: resolution alone doesn’t guarantee identification. Lens choice, distance, lighting, and recording bitrate often matter as much as megapixels. Axis’ guidance on pixel density also notes that real-world factors like sub-optimal lighting and compression impact results.
Quick definitions
What “6MP” usually means
Most 6MP CCTV cameras record around 3072 × 2048 pixels.
What “8MP” usually means
Most 8MP cameras are 4K UHD, around 3840 × 2160 pixels.
The key difference (why 8MP can matter)
8MP gives you more detail across the image. Comparing horizontal pixels:
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6MP: 3072px wide
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8MP: 3840px wide
That’s ~25% more horizontal pixels (3840/3072 ≈ 1.25). Translation: at the same field of view, 8MP preserves more detail when you zoom in.
The pixel-density rule that stops megapixel guessing
If you want a simple way to decide between 6MP and 8MP, use DORI / pixels-per-metre.
A common DORI reference is:
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Detect: 25 px/m
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Observe: 62 px/m
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Recognise: 125 px/m
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Identify: 250 px/m
Axis also cites a practical identification guideline used in IEC 62676-4: at least ~40 pixels across the width of a human face.
Important 2026 note: newer IEC/EN 62676-4:2025 guidance has pushed recommended pixel density higher for stronger validation (often discussed as 500 px/m), because 250 px/m doesn’t always hold up in real-world low light/motion blur.
Quick “does 8MP matter?” test
Use this rough formula:
Pixel density (px/m) = horizontal pixels ÷ scene width (metres)
If you want identification-level detail using the classic 250 px/m baseline:
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6MP: 3072 ÷ 250 ≈ 12.3m scene width
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8MP: 3840 ÷ 250 ≈ 15.4m scene width
So the real difference is about ~3 metres of “identification-level width” when you’re trying to cover a wide scene.
If you use the stricter 500 px/m “validation-style” planning:
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6MP ≈ 6.1m
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8MP ≈ 7.7m
Still a difference—but smaller. This is why lens choice and placement often beat “just buy higher MP.”
When 8MP (4K) actually matters for Australian homes
1) Wide frontages and corner blocks
If one camera needs to cover a big slice of the front yard + driveway + footpath approach, 8MP gives you more usable detail across that wide view.
2) Long driveways (where the action happens far away)
On long driveways, the “useful detail moment” might be 15–25m away. If you can’t mount closer, 8MP helps preserve detail when you zoom in later.
3) “I need to zoom in later” households
For typical Aussie situations like:
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parcel disputes
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driveway incidents
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fence-line / side gate issues
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“someone checked the car doors”
8MP gives you cleaner digital zoom because there are more pixels to work with.
4) When you must use wide lenses
Wide lenses spread pixels thin. If you’re forced into a wide field-of-view (big yard, big driveway), 8MP helps maintain pixel density.
When 8MP is NOT worth it (and 6MP is the smarter buy)
1) Close-range entry points (porch / back door)
At a porch, people are typically close. If placement is correct, 6MP is already plenty.
If your porch footage isn’t clear, it’s usually because of:
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camera mounted too high
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wrong angle (top-down view)
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poor lighting / backlight
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bitrate set too low
Not because “you didn’t buy 8MP.”
2) Low-light performance (sensor + lens can beat megapixels)
In night scenes, megapixels don’t automatically win. Axis points out higher pixel density is helpful but real-world issues like lighting and compression still affect identification.
So for night performance, a strong low-light camera at 6MP can outperform a cheap 8MP camera.
3) If you can’t support 8MP bitrate/storage properly
If you run 8MP at a low bitrate, the footage can look soft/blocky—so you don’t get the “4K benefit” you paid for.
Storage reality (7 / 14 / 30 days): 6MP vs 8MP in simple numbers
Storage is mostly driven by bitrate, not “megapixels on the box.” Axis shows this clearly with bitrate-to-GB/day examples (e.g., 0.64 Mb/s ≈ 6.91 GB/day), which implies 1 Mb/s ≈ ~10.8 GB/day for continuous recording.
Practical baseline assumptions (typical starting point)
To keep this simple, here are common starting bitrates for smooth home footage (12–15fps, H.265-ish settings), then we add 20% headroom:
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6MP: ~3 Mb/s per camera
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8MP: ~4 Mb/s per camera
(Real-world bitrate varies by scene complexity and settings—trees, traffic, rain, insects = more data.)
Per camera (24/7 recording, +20% headroom)
Using 1 Mb/s ≈ 10.8 GB/day
6MP (~3 Mb/s):
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7 days: ~0.27 TB
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14 days: ~0.54 TB
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30 days: ~1.17 TB
8MP (~4 Mb/s):
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7 days: ~0.36 TB
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14 days: ~0.73 TB
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30 days: ~1.56 TB
4-camera home system (same assumptions)
6MP (4 cams):
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14 days: ~2.18 TB
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30 days: ~4.67 TB
8MP (4 cams):
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14 days: ~2.90 TB
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30 days: ~6.22 TB
Takeaway: 8MP isn’t “a little more storage.” Across a multi-camera system, it adds up quickly.
What to choose by area (simple Aussie home guide)
Driveway
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Choose 6MP if the camera can be mounted so the key action area is reasonably close
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Choose 8MP if it must cover a wide driveway + frontage and you want zoom detail at distance
Porch / front door
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6MP is usually the smarter choice (spend on better low-light/WDR and correct placement)
Backyard / patio
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6MP for back door/patio (close-range)
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8MP for large yard overview where you may zoom later
Side access / side gate
Often the highest value camera zone.
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6MP is typically perfect because the walkway is narrow (higher pixel density)
The one thing that matters more than 6MP vs 8MP
A well-placed 6MP camera beats a badly placed 8MP camera every time.
If you want the best outcome:
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put cameras where they can actually capture faces (approach angles)
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choose the right lens for the width you need
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then choose 6MP or 8MP based on how wide the scene is and how much zoom you’ll do later
FAQs
Is 8MP always better than 6MP?
No. 8MP gives more detail across wide scenes, but low-light performance, lens choice and bitrate settings can matter more.
What resolution is 6MP vs 8MP?
6MP is commonly ~3072×2048 and 8MP (4K) is commonly ~3840×2160.
Does 8MP need more storage?
Yes. Bitrate is the real driver of storage, and higher resolution often requires higher bitrate to keep quality. Axis’ bitrate-to-GB/day examples show why storage scales with bitrate.
Is 6MP enough for most Australian homes?
Yes—6MP is often the best value/performance balance for typical homes, with 8MP used selectively for wide areas or long distances.
Conclusion (clear recommendation)
For most Australian homes in 2026, 6MP is the smarter default: strong detail, manageable storage, and excellent real-world results.
Go 8MP when you must cover wide areas at distance and you know you’ll be zooming in later (long driveways, wide frontages, larger blocks).
