Buying security cameras for a business should be simple, but the industry has made it a spec-sheet arms race: megapixels, TVL, WDR, IR range, H.265+, AI this and 4K that. Meanwhile, the actual difference between a camera system that solves problems and one that disappoints has surprisingly little to do with any of those numbers.
After designing and installing systems for offices, practices, restaurants, and shops across Metro Detroit, here's our honest guide to what matters — and what's mostly marketing.
Start with the job, not the gear
Before any hardware discussion, answer one question per area: what do I need this camera to do? The answers fall into three buckets, and they demand different things:
- Deter and observe. A visible camera over the parking lot or sales floor. Wide view, moderate detail. Most cameras qualify.
- Recognize. Confirm the identity of someone you already know — an employee at the register, a regular at the door. Moderate detail at a known distance.
- Identify. Produce evidence usable with police or in court: a clear face of a stranger, a legible license plate. This is the demanding one — it dictates specific camera placement, focal length, and lighting, and no amount of megapixels fixes a camera mounted too high, too far, or aimed into the sun.
The most common failure we see in DIY and low-bid installs isn't cheap cameras — it's identify jobs given to observe setups: footage that shows a person-shaped blur committing a crime in perfect 4K.
Resolution: useful, then quickly overrated
Resolution matters up to a point. 4 MP–8 MP (2K–4K) is the practical sweet spot for business use — enough pixel density to digitally zoom on recorded footage and still read detail. Beyond that, more megapixels mostly buy you bigger storage bills and worse low-light performance (smaller pixels gather less light), not better evidence.
What the spec sheet won't tell you: placement and lighting beat resolution every time. A well-placed 4 MP camera at eye-level near a choke point (a doorway everyone must pass through) outperforms an 8 MP camera bolted to the roofline looking down at the tops of heads.
Storage: the decision with the longest consequences
- Local NVR. A recorder on-site holds weeks of footage with no monthly fees. Downsides: it's stealable (mount it locked and out of sight), and remote access depends on your network setup.
- Cloud storage. Footage survives theft, fire, and vandalism, and is viewable from anywhere with clean apps. Cost scales with cameras and retention days.
- Hybrid — local recording with cloud backup of key clips — is the setup we recommend most: continuous local footage plus tamper-proof copies of what matters.
Decide retention up front: 30 days is the common business default; some industries and insurers require 60–90. Retention drives storage sizing, which drives cost — it's the number to fix first.
The feature that changed everything: smart detection
Old motion detection alerted on everything — headlights, rain, the parking lot flag — training owners to ignore alerts entirely. Modern AI detection distinguishes people from vehicles from animals from noise, and can flag specific events: a person in the yard after hours, a vehicle lingering at the loading dock, a door left propped.
This is the single biggest practical upgrade of the past decade, because it converts cameras from forensic tools (reviewing footage after something happened) into preventive ones (a phone alert while something is happening). When paired with access control, events cross-reference automatically: a forced-door alert arrives with the video clip attached.
Wiring: do it once, do it right
Commercial systems overwhelmingly use PoE (Power over Ethernet) — one cable per camera carrying both power and data. It's more reliable than Wi-Fi cameras (which share airtime with everything else in the building and die when someone unplugs the wrong thing) and simpler than coax. Cabling is half the cost of an install, and it outlives two or three generations of cameras — economize on cameras before you economize on cabling.
Cameras should also live on their own network segment, isolated from business systems — both for bandwidth and because cheap cameras with default passwords are a favorite entry point for attackers. (Our network guide covers segmentation in more depth.)
Legal quick-notes for Michigan businesses
Video in workplaces and public-facing areas is generally lawful; camera use in areas with a reasonable expectation of privacy (restrooms, changing areas) is not. Michigan is a one-party consent state for conversations you're part of, but recording audio on security cameras of other people's conversations raises eavesdropping issues most businesses should simply avoid — we typically disable microphones. Post signage; it strengthens deterrence and your legal position. For specifics, consult your attorney.
Questions that separate good installers from box-mounters
- Can you show me the expected view from each proposed camera position before install?
- What happens when a camera or the recorder fails — who notices, you or us? (Managed systems self-report; unmanaged ones fail silently until footage is needed.)
- Are the cameras on an isolated network with non-default credentials?
- What's the warranty on labor, not just hardware?
- Will this integrate with our door access and alarm on one platform?
The bottom line
A camera system succeeds or fails at design time — placement, lighting, storage, and network — long before brands and megapixels enter the conversation. That's why we start every camera project with a site survey and a design you can react to, and why our systems come monitored and maintained: cameras only have value if they're working the day you need yesterday's footage.