Resolution is the number everyone compares, and the one that misleads most. A 4K camera is not four times better; it is four times more data. It helps when detail matters and the scene suits it.
The numbers
| Name | Megapixels | Pixels |
|---|---|---|
| 1080p | 2 MP | 1920 x 1080 |
| 4 MP | 4 MP | 2560 x 1440 |
| 4K | 8 MP | 3840 x 2160 |
What extra resolution gives you
More pixels let you zoom into recorded footage and still see detail, and they cover wider areas with one camera. Where a camera watches a long driveway or a car park, 4K can mean one camera instead of two.
What it does not fix
- Poor lighting or glare
- A camera mounted too far from the subject
- A dirty lens
- Heavy video compression
A well-placed 2 MP camera at head height can show a face better than a badly placed 8 MP camera on a high wall.
Choose by task
| Task | Suggested resolution |
|---|---|
| Recognise a face at a door | 4 MP, close and level |
| General room or shop floor | 2-4 MP |
| Driveway or gate | 4-8 MP |
| Number plates | Depends on lens and speed; use a dedicated plate camera |
| Large yards, car parks | 8 MP or PTZ |
Regulated businesses may have a minimum set by the authority. For example, Sharjah expectations are discussed in Sharjah Police CCTV requirements. Check the current figure for your activity.
The storage cost
Resolution multiplies storage. An 8 MP camera typically records at roughly double the data rate of a 4 MP camera. For eight cameras kept 60 days, that can mean many extra terabytes. Use our storage guide, and the helpful formula in the help centre.
Bandwidth and viewing
Phone viewing over mobile data uses a lower-quality sub-stream, so 4K does not slow your app. But recorder and network switch capacity must support the total bitrate.
Our practical approach
Put the best camera where the identification matters most, usually the entrance and gate, and use 2-4 MP elsewhere. Spending evenly across all positions wastes money. Ask for a quote with a camera schedule: request a CCTV quote.
Conclusion
Pick resolution per position. 4 MP is the sweet spot for most; 4K is for distance and large areas; 1080p is fine for low-risk views.
Frequently asked questions
Is 4MP a good compromise?
Yes. 4 MP gives clearly more detail than 1080p with a smaller storage cost than 4K, and it suits most entrances and gates.
Does 4K work well at night?
Not automatically. Night quality depends on the sensor, lens and lighting. A good 4 MP camera can beat a poor 8 MP camera in the dark.
