I came across this field of view chart and thought others might find this useful. I did. When buying a lens on a camera we can determine what field of view is available by the lens size.
SECURITY CAMERA LENS ANGLE OF VIEW CHART
1.2mm lens has approximate 185 degree field of view
1.7mm lens has approximate 170 degree field of view
2.1mm lens has approximate 158 degree field of view
2.5mm lens has approximate 147 degree field of view
2.8mm lens has approximate 130 degree field of view
NATURAL HUMAN EYE 2.97 MM
3.0mm lens has approximate 127 degree field of view
3.6mm lens has approximate 92 degree field of view
4.0mm lens has approximate 88 degree field of view
6/0mm lens has approximate 78 degree field of view
8.0mm lens has approximate 58 degree field of view
12 mm lens has approximate 28 degree field of view
16 mm lens has approximate 19 degree field of view
25 mm lens has approximate 13 degree field of view
50 mm lens has approximate 8 degree field of view
Field of View Chart
Re: Field of View Chart
Nice little calculator; it's been very useful: http://www.supercircuits.com/resources/ ... calculator