Choosing the correct lenses for your security cameras is an important aspect of designing an effective video surveillance system. In an effort to guide your decision, we have created this handy CCTV lens calculator and view simulator. By adjusting the parameters below you can visualize the effects of different lens focal lengths at various distances to a given scene. Contextual help for the parameters is available by hovering the circular help icons.
HINT: After inputing a number in one of the fields, press [TAB] to recalculate.