CCTV Buying Guide: How to Choose the Right Security Cameras

Buying CCTV can feel like wading through spec sheets: megapixels, lens sizes, night vision names that change from brand to brand. The truth is that a good system isn’t about the biggest numbers. It’s about getting clear, usable footage of the things that matter on your property, day and night. This guide walks you through each decision in the order we work through it with our customers.

1. Start With What You Need to Capture

Before looking at any camera, ask what each one is actually for. Security professionals usually think about it in three levels:

• Identify: close enough to recognise a face or read a number plate. This is what police and insurers actually need.
• Recognise: enough detail to tell what someone was wearing or what they were carrying.
• Observe: a wide view showing movement and activity, like someone crossing a yard or a car coming up the driveway.

Most good systems mix all three: identification cameras at entry points such as doors, gates and the driveway, plus wider observation cameras covering yards and open areas. Getting this plan right matters far more than any single spec.

2. Resolution: Do More Megapixels Matter?

Higher resolution, measured in megapixels (MP), means more detail, which lets you zoom into recorded footage further before it turns to blocks. As a rough guide:

• 4MP is a solid all-rounder for most homes and covers typical driveways and entries well.
• 6MP to 8MP (4K) is worth it for wide areas, larger blocks and spots where you want to zoom in after the fact.

But resolution isn’t everything. A well-placed 4MP camera with a good sensor will often beat a badly placed 8MP camera, especially at night. Higher resolution also uses more storage, so it affects how much footage you can keep.

3. Lens and Field of View

The lens decides how wide or how zoomed-in a camera sees, and it’s one of the most overlooked choices:

• Wide-angle lenses (smaller mm numbers) cover more ground but show less detail at distance. They’re great for yards and patios.
• Narrower lenses (larger mm numbers) see further with more detail but cover a smaller area. They suit long driveways and gates.
• Varifocal lenses can be adjusted on site to frame the view exactly, which is useful for awkward angles.

A common mistake is putting a very wide camera at the end of a long driveway, then finding a car is only a few pixels wide on the footage. Matching the lens to the distance fixes that.

4. Night Vision Explained

A camera that’s sharp during the day but muddy at night only covers half the clock, so night performance matters. Every manufacturer has its own marketing name for this, but it comes down to two approaches:

• Infrared (IR) night vision: invisible infrared light gives clear black-and-white footage in total darkness. It’s discreet and reliable.
• Colour night vision: sensitive sensors, sometimes with a small built-in white light, keep footage in colour at night. Colour helps identify clothing and vehicles, and a light switching on can also act as a deterrent.

The right choice depends on the spot. Colour works well where there’s some ambient light, like a street light or porch light. IR is often better for dark back corners where you don’t want a light coming on. Check the rated night-vision range against the actual distance you need to cover.

5. Bullet, Dome or Turret?

• Bullet cameras are long and obvious, which makes them a visible deterrent. They’re good for long-range views along driveways and fence lines.
• Dome cameras are compact and discreet, and harder to tamper with or tell which way they’re pointing. They suit eaves, patios and shopfronts.
• Turret cameras have a dome-like shape without the glass bubble, so there’s less glare and fewer spider webs messing with night vision. They’re a popular choice for homes.

In Mackay’s climate, make sure any outdoor camera is properly weather-rated (look for IP66 or IP67) and mounted so it isn’t facing straight into the afternoon sun.

6. Wired vs Wireless Cameras

“Wireless” cameras still need power, either from a battery you recharge or from a nearby power point, and they rely on your Wi-Fi reaching them reliably. Hardwired cameras use a single network cable that carries both power and video, often called PoE (Power over Ethernet).

• Hardwired (PoE): the most reliable option, with no batteries, no Wi-Fi dropouts, steady recording and better image quality. It needs cabling, so it’s best done during or after a professional install.
• Wireless: quicker to put up and handy where running a cable isn’t practical, but more prone to dropouts, battery hassles and missed footage.

For anything you’re relying on for security, we recommend hardwired wherever possible.

7. Recording and Storage

Cameras are only half the system. The footage has to be recorded somewhere:

• NVR (network video recorder): a box with a hard drive that records all your cameras on site. There are no monthly fees and it keeps recording even if the internet drops. This is the standard for most installed systems.
• SD card in the camera: fine as a backup, but if someone takes the camera, the footage goes with it.
• Cloud storage: footage stored online, usually with an ongoing subscription and dependent on your upload speed.

How many days of footage you keep depends on the number of cameras, their resolution, whether they record continuously or only on motion, and the hard drive size. As a rule, aim for at least a couple of weeks. Incidents often aren’t noticed straight away. Put the recorder somewhere out of sight so it can’t easily be taken.

8. Smart Detection and Phone Alerts

Basic motion detection triggers on anything that moves: trees in the wind, headlights, the dog, a wallaby. Modern cameras with person and vehicle detection filter most of that out, so the alerts on your phone actually mean something. You can also draw zones and tripwires, for example only alerting when someone crosses the front gate after 10pm.

Well-tuned alerts are the difference between a system you use and one you mute after a week. That tuning is a big part of a good installation.

9. Where to Put Your Cameras

• Cover every entry point: front door, back door, side gates, garage and the driveway.
• Get the height right: high enough to be hard to reach, but not so high that you only see the tops of heads. Around 2.5 to 3 metres works well for identifying faces.
• Watch the light: avoid pointing cameras straight at the sun, bright sky or a light source, or faces end up as silhouettes.
• Overlap your coverage: cameras that can see each other make it much harder to disable one unnoticed.
• Respect your neighbours: aim cameras at your own property rather than into neighbouring yards or windows. Recording audio can also carry extra legal obligations, so ask us before enabling it.

10. Power Outages, Internet and Rural Properties

A system that records to an on-site NVR keeps recording without the internet. You just can’t view it remotely until the connection is back. Power is different: if the power goes out, so do your cameras, unless the recorder and network gear are on a UPS (battery backup). That’s worth considering in storm season.

On acreage and rural blocks without NBN, remote viewing works over a Starlink connection. We install both, so we can set up cameras and internet together, including longer cable runs out to sheds and gates.

11. What Affects the Cost of CCTV?

There’s no single price for CCTV because every property is different. The main things that affect it are:

• The number of cameras and the type of each one (resolution, lens, night vision)
• How far and how hard the cable runs are: single-storey with roof access, versus double-storey, tiled roofs or detached sheds
• Recorder size and how many days of footage you want to keep
• Extras like battery backup, alarms or Starlink

When comparing quotes, compare complete systems, not just camera prices. Ask what’s included: the recorder and hard drive, cabling, mounting, app setup, alert tuning and after-sales support. A cheaper system that misses the moment you need it isn’t a saving. We give a clear, itemised quote upfront so you know exactly what you’re getting.