Enter the detector element size and the camera focal length into the Calculator. The calculator will evaluate the Instantaneous Field of View. 

Instantaneous Field of View Formula



  • IFOV is the Instantaneous Field of View ()
  • DES is the detector element size
  • CFL is the camera focal length

To calculate the Instantaneous Field of View, divide the detector element size by the camera focal length.

How to Calculate Instantaneous Field of View?

The following steps outline how to calculate the Instantaneous Field of View.

  1. First, determine the detector element size. 
  2. Next, determine the camera focal length. 
  3. Next, gather the formula from above = IFOV = DES / CFL.
  4. Finally, calculate the Instantaneous Field of View.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

detector element size = 2.45

camera focal length = 1.5