What is the difference between the 2.4mm, 4mm and 6mm camera lens?
The 4MM is best to look at the area of about 4 meters, and so on. The approximate distance is like this
Specific theoretical value you can go to relevant website to check, in my experience to see, 2.4 MM best is to see 2.4 meters far and right area
The smaller the number, the bigger the picture, the smaller the image. Use distance due to different actual site adjustment.
