Another type of surveillance system is the PTZ cameras. PTZ stands for pan-tilt-zoom. These are primarily used to monitor a wide area with just one camera. There are two types of these cameras, the conventional and the digital. If what you have is the conventional camera, you physically rotate it to pan and tilt, while the zoom control is done by 2 lenses moving mechanically closer to each other or further apart, so that viewed objects appear either larger or smaller.
The digital PTZ cameras will capture in mega pixel resolution a full image. If you decide to zoom in, you’ll be shown larger objects when the pixels in a certain portion of the picture are enlarged.
PTZ cameras cannot cover every part of a large area because they only capture objects where they are aimed. It can happen that when someone climbs up part of your wall which is out of shot, the next thing you will know is that you have already lost your valuables.