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  1. I have realized that in digital camera models, special receptors help to {focus|concentrate|maintain focus|target|a**** automatically. These sensors involving some surveillance cameras change in in the area of contrast, while others work with a beam with infra-red (IR) light, specifically in low lighting. Higher specification cameras at times use a mixture of both devices and will often have Face Priority AF where the video camera can ‘See’ a face as you concentrate only on that. Many thanks for sharing your thinking on this website.