DP0013: How can I calculate the FOV? Where can I change the FOV manually? (Field of View)

Glossary
AR (Aspect Ratio): AR (Aspect Ratio) = (# or pixels in width)/ (# or pixels in height). For example, If the Resolution is 720 x 540, the AR (Aspect Ratio) is 720/540 = 1.33333333

Now the formula for the FOV is little bit more complicated. You can find many formulas from the web. But we have a nice Excel program to help your calculation. Click to download.

First, you need to first find out your AR of the source image to apply the formula.
The formula to do this is: 2 * ARCTAN (1/(2*AR)) where "AR" is Aspect Ratio
The Excel formula is: =2*ATAN(1/(2*B11)) where B11 is the cell that contains the Aspect Ratio
The ATAN() function in Excel returns radians so we need to convert radians in degrees
To do this, we use the function: =(360/(2*PI()))  
We, then multiply the result in radians by the conversion formula: =2*ATAN(1/(2*B11)) * (360/(2*PI()))  

The Excel Sheet looks like this and all you can do is just adding a AR to check the result.
----------------------------------------------------------------------------
Enter Aspect Ratio here                                                             1.333330
Result in Radians =2*ATAN(1/(2*B11))                                   0.717543
Multiplied by the conversion factor =(360/(2*PI()))                    57.295780
Correct field of view =2*ATAN(1/(2*B11)) * (360/(2*PI()))    41.112185
----------------------------------------------------------------------------

The good news is that Toon Boom Digital Pro automatically calculates the FOV for you. You can find this information in Camera module from the network. You can always set manually by checking ‘Override scene FOV’ option and set back by clicking ‘Set Default FOV’ button.

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