How to Choose CCTV Cameras: Bullet, Dome, PTZ and NVR Channels
Please note: this guide was written with the help of AI and may contain mistakes or outdated information. It is general information only. Always do your own research (DYOR): check product specifications with the manufacturer, and use a qualified professional for any electrical, security or gate installation.
A good CCTV system comes down to choosing the right camera types for each area, then a recorder with enough channels, and the cabling to match. Here is a simple way to plan it.
Step 1: Pick the camera type
- Bullet cameras: long and tube-shaped, they are easy to aim and are visible, which helps deter intruders. A common choice for outdoor walls and driveways.
- Dome cameras: compact and harder to tamper with, and the lens direction is not obvious. Good for entrances, corridors and indoor areas.
- PTZ cameras: pan, tilt and zoom. They cover wide areas such as car parks and yards, and can be steered by hand or on a preset tour.
Step 2: Choose IP or analogue (HDCVI)
IP cameras send video over a network cable and are the standard for new installations. Analogue-style HDCVI cameras use coax cable and are useful when you are upgrading an existing system and want to reuse cabling. Browse IP cameras.
Step 3: Choose the resolution
Higher resolution gives more detail, but it also needs more storage and bandwidth. As a guide, 2 MP is enough for general monitoring, 4 MP gives noticeably better detail, and 8 MP suits areas where you need to identify faces or number plates from a distance. Match the resolution to the job, not the other way round.
Step 4: Count your channels
The recorder (NVR for IP cameras, DVR for analogue) must have a channel for every camera, so count the cameras and add a few for the future. Recorders come in 4, 8, 16, 32 and 64 channel versions.
Step 5: Plan the power and network
- PoE: Power over Ethernet delivers power and video down one network cable. Use an NVR with PoE ports, or a PoE switch, to keep cabling simple.
- Cable length: standard network cable is good for up to about 100 m. Use fibre or switches for longer runs.
- Load shedding: put the recorder, switch and router on a UPS or battery backup, so recording continues during outages.
Step 6: Storage
Recording time depends on the number of cameras, resolution and settings. Fit a surveillance-rated hard drive that is large enough for the days of footage you want to keep.
Ready to shop?
Start with the cameras for your most important areas, then size the recorder to match. If you would like a second opinion, email info@diyprotect.co.za or call 010 824 5833. For protection against break-ins, pair CCTV with an alarm: see wired vs wireless alarm systems.
AI-assisted content. Please do your own research (DYOR) before you buy or install.