How many security cameras do you actually need?

Two cameras in the right positions will tell you more than five in convenient ones. The question is not how much of the property is visible — it is whether you can identify a person and a vehicle at the points where they have to pass.

Everyone arriving at a property goes through a small number of choke points. The driveway approach. The gate. The yard between the house and the outbuildings. The door of each building that matters. Cover those and you have covered the property, whatever the acreage.

These are two different jobs and they want different cameras. An overview camera shows you that something happened and roughly where. An identification camera shows you who and which vehicle, which is what is actually useful afterwards.

A wide camera mounted high covering the whole yard is an overview camera, no matter what the resolution claims. Faces and plates at that distance become a handful of pixels. One camera positioned at the height and distance to identify at the entrance is worth more than three surveying the property.

For most farm and acreage properties the useful set is: one at the driveway approach positioned to catch plates, one covering the yard between house and outbuildings, and one at the entrance of each building that holds anything worth taking — machinery, fuel, tools.

That is often four or five cameras, not twelve. The money that would have gone on the extra seven is usually better spent on getting the network out to the buildings properly and on cameras rated for the environment they sit in.

Most incidents happen in the dark, and most disappointment with camera systems is about night footage. A sensor that performs in low light beats a higher-resolution one that does not, every time.

Where the camera faces matters too. A camera pointed at a yard light or the low winter sun will be washed out at exactly the times you want it. That is a placement decision, and it is free to get right at install and expensive to fix later.