Focal length&field angle: 4 mm, horizontal field angle: 83.7 °, vertical field angle: 43 °, diagonal field angle: 100.3 ° 6 mm, horizontal field angle: 51.8 °, vertical field angle: 27.9 °, diagonal field angle: 60.5 ° 8 mm, horizontal field angle: 39.4 °, vertical field angle: 21.8 °, diagonal field angle: 45.7 °