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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.
Please note that the images used here were taken with a digital SLR, and are much higher quality than you can expect from a security camera. The purpose of this tool is to simulate field of view, not image quality.
HINT: After inputing a number in one of the fields, press [TAB] to recalculate.