Angular Field of View – Problem 3

\[ \alpha = 2\arctan\frac{d}{2f} \] \[ d = a\sqrt2 \] \[ d = 24cm.\sqrt2 \] \[ d = 33.94112549695cm. \times \frac{10mm.}{1cm.} \] \[ d = 339.41125496954mm. \] \[ 113^{\circ} = 2\arctan\frac{339.41125496954mm.}{2f} \] \[ f = 112.32570448582mm. \] \[ f \approx 112.33mm. \leftarrow \text{answer} \]