Where to place cameras and how to choose the viewing angle
Camera position follows the task: observing an entrance, following a route or reviewing detail. A lens's horizontal field of view helps draw the scene, but visible floor coverage does not guarantee identifying a person. Height, distance, light and obstacles also require checks.
Start with the important points
Mark entrances, routes and areas of interest on a plan. Note possible obstructions: an open door, shelves, a vehicle or vegetation. Examine the scene from the proposed mounting position.
Agree what is outside the project and who will access recordings. These decisions help avoid positions that show a large area without answering the actual question.
Use the exact camera and lens variant
A 2.8 mm lens does not have the same angle on every camera. Check the data for the selected camera/lens combination. If a variable lens lists wide and tele endpoints, those are not specifications for every intermediate position.
A wide angle shows more scene, but does not establish useful detail at the farthest point. Infrared illumination range describes supplementary lighting, not a guaranteed identification distance.
Test the scene before finalising
The GuardaNexo planner provides a starting layout on an open rectangular floor. Its sectors do not simulate interior walls, height, reflections or occlusion. The analysis radius is a planning setting.
A site assessment reviews actual positions, day and night lighting, framing and recorded samples. Save the design with your priority areas so mounting adjustments can be discussed.
Questions about this topic
Should I choose the widest lens?
It depends on the task. An overview and a point needing detail may require different lenses or positions.
Is there one correct mounting height?
No. Consider the viewing task, scene, maintenance access and mounting conditions.
Does overlapping coverage remove every blind spot?
Not necessarily. Obstacles and actual orientation may still hide areas.