Dome Security Cameras are named for their dome-like shape. Dome cameras are commonly used in surveillance systems inside of homes, casinos, retail stores, and restaurants. ... A varifocal dome camera gives you the flexibility to adjust the focal distance of the camera lens to exactly where you need it.

This video compares various sizes of CCTV camera lenses to show the difference in the angle of view and zoom depth that each lens provides. The following lenses where used to make these sample surveillance videos: 2.8-12mm, 6-60mm, and 5-100mm. Videos were captured using the following lens settings to compare the angle zoom level that each provide side-by-side: 2.8mm, 6mm, 12mm, 60mm, and 100mm. We believe that real sample video captured by actual security cameras will show customers the different much better than a CCTV lens chart.