Camera Lenses

Typically, security cameras use one of three types of concave lenses, a monofocal lens, varifocal lens, and zoom lens. These lenses come in various sizes with examples like:

• 1.3mm
• 2.8mm
• 4mm
• 4.1mm
• 6mm
• 8mm
• 9mm
• 12mm

While these and more are available in one manner or another, it is more common for security cameras to have a standard set of lenses used. For practical reasons, outdoor security cameras will not necessarily use the same lens as a device installed in an indoor hallway.

The differences between 2.8mm to 4mm are not significant, but there are differences in these and lenses similarly different in size. The smaller of the two provides a detailed depiction of objects within view and features a slightly wider view at that. However, the 4mm lens produces clearer footage at a slightly farther distance.