A security camera lens size determines the field of surveillance view and zoom level that the camera provides. The camera lenses that CCTV Camera Collsam Distribution supplies generally range from 2.5mm to 100mm. The larger the size of the lens, the more narrow and zoomed in the field of view is.
Auto-Iris Varifocal Camera LensesVarifocals have a to and from range, most typically cover somewhere between 2.8 and 12mm. For long-distance surveillance like license plate recognition cameras, a range of 5 to 60mm is common. The key benefit to a varifocal camera is the flexibility this gives you during installation. They allow you to adjust the lens between the top and bottom limits of its view angle. This flexibility does come with an increase in cost.