Choosing a CCTV camera starts with the scene you need to monitor. A camera that gives a useful overview of a parking area may not show enough detail to identify a person at a doorway. This CCTV camera buying guide explains how to compare lenses, night vision, recording equipment, and installation needs.

Start with the detail you need

Decide what each camera should show: activity across an area, a person approaching an entrance, or detail at a specific point. Note the distance to that point and the lighting during the day and at night. Avoid choosing a camera by its megapixel rating alone.

Choose the right lens and viewing angle

A wide view covers more of the scene, but a person in the distance occupies less of the image. A narrower view concentrates the image on a smaller area. A fixed lens has a set focal length; a varifocal lens allows adjustment within its specified range.

Read our fixed versus varifocal lens guide and lens size comparison. Compare the actual field-of-view specifications for the camera model you are considering.

Compare resolution and night vision together

Resolution describes the number of pixels in a digital image. Lighting, lens quality, focus, motion, and recording settings also affect the detail you can use. Higher resolution alone does not guarantee clearer footage in every scene.

Conventional infrared night mode produces black-and-white video. Color images at night require sufficient visible light. An advertised infrared illumination distance is not a guarantee that you can identify a face or read a license plate at that distance.

For background, explore megapixels and TV lines and wide dynamic range cameras. Test difficult lighting conditions before accepting the final setup.

Match cameras to the recorder

Check the camera output against the recorder specifications before buying. IP cameras use network connections. HD-over-coax cameras require support for their output format, such as TVI, CVI, or AHD. A matching connector is not enough to establish compatibility.

Confirm supported resolution, frame rate, audio, and any analytics you need. Start with our network video recorder guide or HD-CVI compatibility guide.

Plan power, cabling, and recording

Check the selected camera and recorder requirements for power, cable routes, and storage. Decide how long you need to retain footage and whether recording will be continuous or event-based. Include a plan for checking recordings and exporting a useful clip.

Our guides to Power over Ethernet, Power over Coax, and security cable types explain related options.

CCTV camera buying checklist

  • Define the scene, target distance, and detail required.
  • Compare lens coverage and day/night performance.
  • Verify camera, recorder, and software compatibility.
  • Check environmental ratings, mounting, cabling, and power requirements.
  • Plan storage, access permissions, and maintenance.
  • Test live viewing, playback, and video export after installation.

Find equipment for your project

Browse Collsam security products or learn about video surveillance installation. For help defining a system, request a security system quote with details about your property and existing equipment.