Hi,
I am a bit confused when it comes to calculate viewing angles.
Have used several lens calculators and they talk about "reading direction"
When I change this value the viewing angle change lots.
Could anyone pls explain how this works? What will I get when I buy a camera?
I'm looking for a outdoor camera with IR and at least 80 degrees viewing angle.
Will a 1/3 CCD with 4.0 be enough, or is 3.6 or 2.8 needed?
Thanks much,
Roger