Angle of View Calculation in the Basler Lens Selector#
There are several methods to calculate the angle of view of a camera/lens combination, for example:
Method 1: Based on the working distance and the object size:
Method 2: Based on the lens' focal length and the sensor size:
The results of these calculations may slightly differ.
The Basler Lens Selector calculates the angle of view with Method 2.
Example: Assume we use a IMX540 camera (a2A-5328) with a 25 mm lens:
Using Method 2, we calculate:
And this is exactly what we get in the lens selector:
If we consider a working distance of 710 mm, the calculator indicates that a focal length of 25 mm will allow viewing an area of 400 mm x 345 mm.
However, using Method 1, the angles of view are:
You can see that the results are slightly different.
The lens selector tool calculates the angle of view based on the focal length and the sensor size.