Shield Technology

Lens Field of View Chart




This chart represents the angle and field of view calculations for cameras with 1/3′” lenses. Note that many online lens calculators produce inaccurate angle measures for these focal lengths. Also, most 1/4″ cameras produce a significantly narrower field of view with the same focal length lens. Due to the physical nature of lens optics, the numbers listed below should be considered accurate to within + / – 3º and therefore a few feet / meters as well. They are intended as approximate guidelines to help select the appropriate lens, while each camera in fact has its own unique field of view with each specific lens. In addition, C- and CS-mount lenses typically deliver a slightly narrower field of view than our comparable board lenses. Lenses wider than roughly 5mm produce “artificially” wider fields of view than more telephoto lenses. In order to do so, the video image is slightly curved at the edges of the screen. While this artificial distortion is nominal for focal lengths between 4.3 and 3.6mm, curvature increases with wider angle lenses.

Lens Focal Length Camera’s Viewing Angle   Distance between video camera and video subject area           
      5′ (1.5m) away  10′ (3.0m) away  15′ (4.6m) away  25′ (7.6m) away  50′ (15.2m) away  100′ (30.5m) away 
mm Horiz.º Vert.º Diag.º H area V area H area V area H area V area H area V area H area V area H area V area
1.78 136º 102º 170º 24.8′ 18.6′ 49.6′ 37.2′ 74.4′ 55.8′ 124.0′ 93.0′ 248′ 186′ 496′ 372′
        (7.6m) (5.7m) (15.1m) (11.3m) (22.7m) (17.0m) (37.8m) (28.4m) (75.6m) (56.7m) (151.2m) (113.4m)
2.10 128º 96º 160º 20.5′ 15.4′ 41.0′ 30.8′ 61.5′ 46.2′ 102.5′ 77.0′ 205′ 154′ 410′ 308′
        (6.2m) (4.7m) (12.5m) (9.4m) (18.8m) (14.1m) (31.3m) (23.5m) (62.5m) (47m) (125m) (93.9m)
2.45 120º 90º 150º 17.3′ 13.0′ 34.6′ 26.0′ 51.9′ 39.0′ 86.5′ 65.0′ 173′ 130′ 346′ 260′
        (5.3m) (4m) (10.5m) (7.9m) (15.8m) (11.9m) (26.4m) (19.8m) (52.7m) (39.6m) (105.5m) (79.3m)
2.80 109º 82º 136º 14.0′ 10.5′ 28.0′ 21.0′ 42.0′ 31.5′ 70.0′ 52.5′ 140′ 105′ 280′ 210′
        (4.3m) (3.2m) (8.5m) (6.4m) (12.8) (9.6m) (21.3m) (16m) (42.7m) (32m) (85.4m) (64m)
2.97 104º 78º 130º 12.3′ 9.6′ 24.6′ 19.2′ 36.9′ 28.8′ 61.5′ 48.0′ 123′ 96′ 246′ 192′
        (3.8m) (2.9m) (7.5m) (5.9m) (11.3m) (8.8m) (18.8m) (14.6m) (37.5m) (29.3m) (75m) (58.5m)
3.60 74º 56º 92º 7.5′ 5.7′ 15.0′ 11.4′ 22.5′ 17.1′ 37.5′ 28.5′ 75′ 57′ 150′ 114′
        (2.3m) (1.7m) (4.6m) (3.5m) (6.9m) (5.2m) (11.4m) (8.7m) (22.9m) (17.4m) (45.7m) (34.8m)
3.70 72º 54º 90º 7.3′ 5.5′ 14.6′ 11.0′ 21.9′ 16.5′ 36.5′ 27.5′ 73′ 55′ 146′ 110′
        (2.2m) (1.7m) (4.5m) (3.4m) (6.7m) (5m) (11.1m) (8.4m) (22.3m) (16.8m) (44.5m) (33.5m)
4.0 67º 50º 83º 6.6′ 5.0′ 13.2′ 10.0′ 19.8′ 15.0′ 33.0′ 25.0′ 66′ 50′ 132′ 100′
        (2m) (1.5m) (4m) (3m) (6m) (4.6m) (10.1m) (7.6m) (20.1m) (15.2m) (40.2m) (30.5m)
4.30 63º 47º 78º 6.1′ 4.6′ 12.2′ 9.2′ 18.3′ 13.8′ 30.5′ 23.0′ 61′ 46′ 122′ 92′
        (1.9m) (1.4m) (3.7m) (2.8m) (5.6m) (4.2m) (9.3m) (7m) (18.6m) (14m) (37.2m) (28m)
5.0 50º 38º 64º 4.7′ 3.5′ 9.4′ 7.0′ 14.1′ 10.5′ 23.5′ 17.5′ 47′ 35′ 94′ 70′
        (1.4m) (1.1m) (2.9m) (2.1m) (4.3m) (3.2m) (7.2m) (5.3m) (14.3m) (10.7m) (28.7m) (21.3m)
6.0 42º 32º 53º 3.8′ 2.9′ 7.6′ 5.8′ 11.4′ 8.7′ 19.0′ 14.5′ 38′ 29′ 76′ 58′
        (1.2m) (0.9m) (2.3m) (1.8m) (3.5m) (2.7m) (5.8m) (4.4m) (11.6m) (8.8m) (23.2m) (17.7m)
8.0 32º 24º 40º 2.9′ 2.2′ 5.8′ 4.4′ 8.7′ 6.6′ 14.5′ 11.0′ 29′ 22′ 58′ 44′
        (0.9m) (0.7m) (1.8m) (1.3m) (2.7m) (2m) (4.4m) (3.4m) (8.8m) (6.7m) (17.7m) (13.4m)
12.0 22º 16º 28º 1.9′ 1.5′ 3.8′ 2.8′ 5.7′ 4.5′ 9.5′ 7.5′ 19′ 15′ 38′ 28′
        (0.6m) (0.5m) (1.2m) (0.9m) (1.7m) (1.4m) (2.9m) (2.3m) (5.8m) (4.6m) (11.6m) (8.5m)
16.0 16º 12º 21º 1.4′ 1.1′ 2.8′ 2.2′ 4.2′ 3.3′ 7.0′ 5.5′ 14′ 11′ 28′ 22′
        (0.4m) (0.3m) (0.9m) (0.7m) (1.3m) (1m) (2.1m) (1.7m) (4.3m) (3.4m) (8.5m) (6.7m)
25.0 11º 8.4º 14º 1.0′ 0.7′ 2.0′ 1.4′ 3.0′ 2.1′ 5.0′ 3.5′ 10.0′ 7.0′ 20.0′ 14.0′
        (0.3m) (0.2m) (0.6m) (0.4m) (0.9m) (0.6m) (1.5m) (1.1m) (3m) (2.1m) (6.1m) (4.3m)
50.0 5.5º 4.2º 0.4′ 0.3′ 0.8′ 0.6′ 1.2′ 0.9′ 2.0′ 1.5′ 4.0′ 3.0′ 8.0′ 6.0′
        (0.1m) (0.1m) (0.2m) (0.2m) (0.4m) (0.3m) (0.6m) (0.5m) (1.2m) (0.9m) (2.4m) (1.8m)