Module 1   Qanuq Ilitaavut (Way of Knowing) Part III. Field of View with Math
Student Page 1-5
Figure 1. The simple formula for field of view (FOV)—the angle a person can see without moving their eyes or their head.
You are now going to use your FOV measurements to calculate the FOV more precisely. If x marks your FOV (in either horizontal or vertical direction), the FOV can be calculated as x (“how high you can see”)
FOV = d (“how far you measured”)
This measures the FOV in units called radians. To convert to angular degrees, multiply this number by 180˚/π , where π = 3.14. That is,
FOV(degrees) = FOV(radians) x 3.14 180
Convert the FOV measurements you recorded on your worksheet to radians and degrees; d is the distance at which the FOV was measured. If you did the measurement right in front of the Viewer, use d = 10 cm.