Shop for cameras and you will see numbers: 2MP, 4MP, 5MP, 8MP, 12MP. The bigger the number, the more you pay and the more storage you need. But does 8MP, often marketed as 4K, actually give you better evidence than 4MP? Sometimes yes, sometimes not at all. Resolution is one of several factors that determine whether you can identify a face or read a plate, and the lens, light and mounting often matter more. This guide explains the difference between 4MP and 8MP cameras, what you gain and what you pay in storage and bandwidth, and where the jump is worth it in New York and New Jersey homes and businesses.
This is general information, not legal advice. Talk to a qualified installer about your specific building and requirements.
1. The Short Version
| Item | 4MP | 8MP (4K) |
|---|---|---|
| Typical resolution | 2560 x 1440 | 3840 x 2160 |
| Pixel count | About 3.7 million | About 8.3 million |
| Bitrate | Moderate | Roughly 1.5 to 2 times higher |
| Best for | General coverage | Wide areas, plates and detail at distance |
| Low-light | Often better per pixel | Needs good sensor and lens |
2. What Megapixels Mean
A megapixel is a million pixels. An 8MP camera has more than twice as many pixels as a 4MP camera, so it can show more detail on the same scene. But pixels alone do not create detail. The lens must be sharp, the sensor must collect enough light, and the image must be in focus. A cheap 8MP camera can look worse than a good 4MP camera.
3. What You Gain From 8MP
More pixels let you zoom in on recorded video and still see detail. They also let one camera cover a wider area while keeping enough pixels on a subject. In a driveway or parking lot, an 8MP camera can capture a plate at a distance where a 4MP camera shows only a blur. For wide scenes, 8MP can replace two 4MP cameras.
4. Pixels on Target
A useful way to think is pixels per foot at the subject. Plate reading often needs on the order of 100 or more pixels across the plate under good conditions, and face identification needs more pixels across the face than simple detection. These numbers depend on angle, light and motion. A narrower lens puts more pixels on a distant subject. Our guide on lens focal length explains how to choose.
5. Storage and Bandwidth
Higher resolution means higher bitrates and bigger files. Storage planning: total GB = cameras x Mbps x 10.8 x days. Eight 4MP cameras at 4 Mbps for 30 days is about 10,368 GB, or roughly 10 TB. Eight 8MP cameras at 8 Mbps for 30 days is about 20,736 GB, or roughly 21 TB. Bandwidth also doubles, which matters on a network or for remote viewing. Our guides on bitrate and on storage planning explain the math.
6. Low-Light Performance
At night, more pixels on the same sensor size means each pixel is smaller and gathers less light, which can increase noise. Larger sensors and better lenses reduce this. Some 4MP cameras outperform cheaper 8MP cameras in the dark. For dim alleys and parking lots, test or choose a camera with a large sensor and good low-light reputation. Our guide on sensor size explains why.
7. Lens and Field of View
An 8MP camera with a wide lens may spread pixels too thin to read plates at distance. A 4MP camera with the right lens aimed at a gate can do better. Match the lens to the job: wide for overview, narrower for identification. A varifocal lens lets the installer fine-tune the view on site.
8. Recorder and Network Limits
Not every recorder can handle many 8MP streams. Check the total throughput rating of the NVR and the switch. Some recorders limit 8MP channels. Plan the whole system, not just the camera. Our guide on NVR vs. DVR explains recorder limits.
9. Compression and Smart Codecs
H.265 and similar codecs reduce file size compared with older H.264, and smart modes can lower bitrate when there is little motion. These help make 8MP practical. Check that the recorder and viewing apps support the codec. Compression can soften detail if pushed too far.
10. Where 4MP Is Enough
For a doorway, an interior room, a small yard or a counter, 4MP gives clear pictures and lower costs. It is plenty for recognizing familiar people and general events. Many homes and small shops do very well with 4MP across the board.
11. Where 8MP Pays Off
Choose 8MP for wide parking lots, long driveways, loading docks, yards, intersections and storefronts facing a street, where one camera must cover a lot of ground, or where you need to zoom into recorded video. Consider 8MP at plate-capture points paired with a proper lens and lighting. Our local pages on commercial security camera installation in Queens and security camera installation in Nassau County describe typical outdoor setups.
12. Mixed Systems
You do not have to choose one resolution for every camera. Use 4MP for general coverage and 8MP for the spots that need detail. This saves storage and money while giving strong evidence where it counts. Our local page on security camera installation in Manhattan describes typical mixed setups.
13. Common Mistakes
- Assuming more megapixels always means better detail.
- Using a wide lens where detail is needed.
- Ignoring night performance.
- Overloading the recorder or network.
- Not planning storage.
- Poor lighting.
- Bad mounting height and angle.
- Paying for 8MP everywhere.
14. Cost
Planning ranges in 2026: 4MP IP camera, $90 to $350 each; 8MP IP camera, $150 to $700 each; installed eight-camera 4MP PoE system, $2,800 to $6,500; installed eight-camera 8MP PoE system, $3,800 to $9,000; additional storage for 8MP, $100 to $600 per extra TB; recorder rated for 8MP, add $100 to $800. These are planning ranges, not quotes.
15. A Second Data Point
NYPD reported burglary down 19.5% citywide in May 2026 compared with May 2025 (NYPD). Whether you choose 4MP or 8MP, the goal is footage that helps police identify what happened, so match resolution to the job.
16. Questions to Ask Your Installer
- Which views need 8MP and why?
- What lens will each camera use?
- How will the cameras perform at night?
- Can the recorder and network handle the load?
- How much storage do I need for the days I want?
- Can I mix 4MP and 8MP?
See our local pages for security camera installation in Manhattan, commercial security camera installation in Queens, security camera installation in Nassau County and our services page.
Choosing resolution? Revolvis will walk the property with you and mark the spots, and size each camera to the job.
17. A Hypothetical Driveway
A Long Island homeowner has a 70-foot driveway and wants plate capture. Hypothetically, the installer uses an 8MP camera with a narrower lens aimed at the entrance, plus 4MP cameras at the front door and rear yard. Storage is sized for 30 days. The driveway camera reads plates in daylight and with added light at night, while the 4MP cameras keep costs down.
18. Testing Before You Commit
Ask your installer to show sample footage at your site, day and night, from the planned mounting height. Check whether you can read a plate or recognize a face at the distance you care about. A test beats a spec sheet.
19. Planning for Upgrades
If you start with 4MP, choose a recorder and network with room for 8MP later. If you start with 8MP, confirm storage and bandwidth. Cable and switches should support future upgrades.
20. Deciding
Use 8MP where you need coverage and detail over distance, and 4MP where general coverage is enough. Ask for both options priced and demonstrated. The best camera is the one that gives usable evidence.
Seasonal Maintenance
Once or twice a year, clean lenses, check focus and confirm recorder health. Review a week of footage for noise at night and for gaps. Foliage, snow and light change through the year, so a view that was sharp in spring may need adjustment in winter.
Reviewing Footage After an Incident
When something happens, export the clip at full resolution, note the date and time, and keep the original. Higher resolution helps most when you need to zoom in later, so make sure the export keeps the original quality rather than a downsized copy.
More From Revolvis
Cameras are one layer of a secure property. The same in-house crew also handles the rest:
- Keyless entry installation and smart lock installation
- Access control systems and commercial access control
- Video doorbells and intercoms
- Alarm system installation
- Complete unified security
Learn more about Revolvis, meet the team, see all services, browse the blog or contact us.
Areas We Serve
Revolvis installs residential and commercial camera systems across the New York metro area. Every borough and county has its own building stock, rules and wiring challenges, so the plan for a Queens two-family is not the plan for a Manhattan co-op.
- Staten Island: houses, detached garages and shop fronts. See security camera installation in Staten Island.
- Brooklyn: brownstones, row houses and storefronts. See security camera installation in Brooklyn.
- Queens: attached brick homes, two-families and busy commercial strips. See security camera installation in Queens.
- The Bronx: pre-war buildings, bodegas and warehouses. See security camera installation in the Bronx.
- Manhattan: co-ops, condos, offices and retail. See security camera installation in Manhattan.
- Long Island: Nassau County and Suffolk County.
- New Jersey: Jersey City, Newark, Hoboken and nearby towns.
The full list is on the service areas page.
Get a Custom Quote After a Site Visit
Revolvis prices every job after a site visit, because the building sets the cost as much as the equipment does. A few things make the estimate faster and more accurate:
- The address and property type: house, apartment, co-op, condo, storefront or warehouse.
- Which doors, sides and areas you want covered, and what worries you most.
- Photos of those spots and any spots where you already have cabling or power.
- How many days of footage you want to keep and whether you want to watch on your phone.
- Any landlord, board, lender or insurer requirement.
Call 347-258-9165 or use the contact page to book a site visit. The quote you receive is written and itemized, so you can compare it line by line.
Frequently Asked Questions
Is 8MP the same as 4K? Roughly. 4K is usually 3840 x 2160, about 8.3 million pixels.
Does 8MP always look better? No. Lens, sensor, light and focus matter too.
How much more storage does 8MP need? Often 1.5 to 2 times as much as 4MP.
Can I mix 4MP and 8MP cameras? Yes, with a compatible recorder.
Is 8MP better for plates? It can help, with the right lens, angle and light.
Is 4MP enough for a home? Often yes.
Ready for a custom quote? Call Revolvis at 347-258-9165 for a site visit and a written, itemized estimate.
Safety note: A camera system supports, but does not replace, good locks, lighting, alarms and everyday habits. If you are in danger or witnessing a crime, call 911. Prices and legal summaries in this guide are general information for the New York metro area, not an offer or legal advice. A written quote after a site visit governs your actual price, and for legal questions you should confirm with the agencies linked in the article or a licensed attorney.