Walk into any camera shop in Egypt and the first pitch you will hear is a resolution number. But the honest answer to 2MP vs 4MP vs 8MP — which camera resolution do you actually need — is: it depends on what the camera must prove. A resolution that identifies a face at a shop door is wasted watching an empty corridor, and a bargain 8MP camera can deliver worse night footage than a good 4MP one. This guide gives you the real distances, the storage math and the field mistakes we fix every week, so you can put the right number in the right place.
Key takeaways
- 2MP (1080p) is still right for small rooms, tight entrances and multi-camera budgets.
- 4MP is the sweet spot for most Egyptian shops, villas and offices — double the detail of 2MP at a modest extra cost.
- 8MP (4K) pays off where one camera covers a wide area and you expect to zoom into recordings.
- Higher resolution eats storage: an 8MP camera fills a hard drive roughly four times faster than a 2MP one.
- Night quality is decided by the sensor and lighting technology, not by the megapixel count.
The same scene captured at different resolutions tells different stories
What resolution actually measures
Resolution is simply the pixel grid: 2MP equals 1920×1080 (Full HD), 4MP equals 2560×1440, and 8MP equals 3840×2160 (4K). More pixels can be spent two ways — more detail on the same scene, or the same detail across a wider scene. That second option is the professional trick: one 8MP camera with a wide lens can honestly replace two 2MP cameras side by side, which changes the cost equation completely.
The rule that matters: pixels on target
Professionals size cameras with the international DORI standard: to identify a stranger you need about 250 pixels per meter of scene, to recognize a known person about 125, and to merely detect movement about 25. With the common 2.8mm wide lens, that translates roughly to: a 2MP camera identifies faces up to about 3 meters and recognizes up to 5; a 4MP camera identifies to about 3.5 meters and recognizes to 7; an 8MP camera identifies to about 5.5 meters and recognizes to 11. Want longer reach? Choose a narrower lens (4mm or 6mm) and trade width for distance — resolution and lens work as a pair.
2MP vs 4MP vs 8MP: the numbers side by side
| Measure | 2MP (1080p) | 4MP | 8MP (4K) |
|---|---|---|---|
| Pixel grid | 1920×1080 | 2560×1440 | 3840×2160 |
| Face identification (2.8mm lens, approx.) | Up to ~3 m | Up to ~3.5 m | Up to ~5.5 m |
| Daily storage, continuous H.265 (approx.) | ~16 GB | ~32 GB | ~65 GB |
| Typical role | Small rooms, tight entrances | Shops, villas, offices | Yards, gates, wide coverage |
| Relative price | Lowest | Moderate | Highest |
Where 2MP is still the right answer
A 2MP camera watching a 3-meter entrance, a stock room or a cashier drawer does its job completely — the face fills the frame and every extra pixel would be spent on the wall behind it. It is also the rational choice when you need ten cameras on a limited budget: full coverage at 2MP beats blind spots at 8MP every single time. And on existing analog systems, staying at 2MP or 5MP over coax avoids touching the wiring at all.
Where 4MP earns its price
4MP has become the default we install for Egyptian shops, villas and offices, because it fixes the classic 2MP complaint: the recording looked fine until you zoomed in. With double the pixels of 1080p, a 4MP camera lets you crop into a corner of the frame — a hand at the shelf, a plate at the gate — and still read the detail. The storage cost is honest but manageable, and the price step from 2MP is small compared to the jump to 8MP.
Where 8MP (4K) is worth it
Buy 8MP when one camera must do the work of two: a factory yard, a compound gate where the same frame should capture the car, the plate zone and the driver area, or a wide storefront. The forensic value is real — you can crop deep into a 4K frame and still hand usable evidence to the police. The conditions: pair it with H.265+ compression, size the hard drive honestly (roughly four times the appetite of 2MP), and mount it where its width is actually used.
Mistakes we fix in the field
- An 8MP camera paired with a tiny hard drive — the system silently keeps only three days of history.
- A cheap 8MP sensor that turns to noise at night, beaten clearly by a good 4MP with proper IR or ColorVu.
- A very wide lens spreading pixels thin — high resolution, yet faces at the gate stay unreadable.
- Mixing up detection and identification: the camera saw someone is not the same as the camera can prove who.
Higher resolution means more detail when you zoom into the image
Frequently asked questions
Is 4K overkill for a home?
For most apartments, yes — 2MP or 4MP covers the entrances well. For a villa with a garden or a wide gate, one 8MP camera covering the whole frontage is often cheaper than the two smaller cameras it replaces.
Does higher resolution mean better night vision?
No — at night the sensor size and the lighting technology decide. Smaller pixels gather less light, so a dense cheap sensor can perform worse after dark. Judge night quality by the sensor and IR or ColorVu specs, not the megapixel line.
How much storage do four 4MP cameras need for two weeks?
Recording continuously with H.265, plan on roughly 130 GB per day for the four cameras — about 1.8 TB for two weeks, so a 2 TB surveillance drive is the sane choice. Motion-only recording or H.265+ can cut that by half or more.
Can I mix resolutions in one system?
Yes, and you should: spend pixels where evidence matters — the gate, the cashier — and save with 2MP where you only need presence. Just confirm the recorder supports the top resolution and size the storage for the mix.
Sources and Further Reading
Related guides
- IP vs HD cameras: the full comparison
- How to choose the right hard drive for your recorder
- H.264 vs H.265 vs H.265+ compression explained
- ColorVu vs IR night vision: which is better
- Hikvision Camera Series Compared
Not sure? Describe the scene to us
Tell FastEgy's engineers what each camera must prove — identify at the door, read plates at the gate, watch a yard — and we will map the resolutions and lenses point by point, with today's prices from the authorized Hikvision distributor in Egypt. Start from the contact page or browse the FastEgy store.