The recommended lens angle for indoor surveillance depends on the size and layout of the space being monitored. A wider lens angle is often preferred to capture more of the room, but this can lead to more distortion and a fish-eye effect. A narrower lens angle can reduce distortion, but may not capture as much of the room.
In general, a lens angle between 60 and 90 degrees is recommended for indoor surveillance in most scenarios. This provides a good balance between capturing a wide enough field of view and minimizing distortion. However, it’s important to consider factors such as the size and shape of the room, the location of entry and exit points, and any specific areas of interest that need to be monitored. Consulting with a professional security installer can help ensure that the right lens angle is selected for optimal coverage and image quality.