Focal length
Définition
The focal length is the distance between the lens and the optical centre of the lens. The focal length determines the width of the angle of view and, necessarily, the size of the objects that appear on the screen.
Définition
The focal length is the distance between the lens and the optical centre of the lens. The focal length determines the width of the angle of view and, necessarily, the size of the objects that appear on the screen.