Table 4.

The angles of camera view for each camera and lens (in °).

Focal Length of Lens	Gazelle	Grasshopper3	Flea3	C600 Web-Camera
50 mm	10.63	10.96	3.89	4.51
35 mm	16.5	16.83	6.01	6.52
25 mm	23.83	24.16	8.58	9.27
22 mm	25.25	25.59	9.44	10.57
17 mm	32.5	32.85	12.24	13.56
9 mm	61.12	61.47	22.91	25.21