Field of view

The field of view or angle of view is the angle that an optical device can pick up. This angle depends on the value of the focal length of the lens and the distance of the object.

Influence of the focal length on the field of view

The larger the focal length, the smaller the angle, or the smaller the field of view. Conversely, the smaller the focal length, the larger the angle, or the wider the field of view.

Influence of the size of the sensor in the field of view

The size of the sensor affects the field of view of a lens:

• As the size of the sensor increases the field of view increases, the focal length appears shorter
• As the size of the sensor decreases the field of view decreases, the focal length appears longer

For a non-Full Frame camera, it is convenient to return the focal length value to its equivalent (or effective) value in 24x36, i.e. the focal length that gives the same field of view on a full-frame camera.

Use

1. Set the focal length you want by turning the wheel or by clicking to enter the value

2. Set the unit of distance you want (cm, m, km, in, ft, yd, mi)

3. Set your focus distance

In the bottom area

4. You get:

• The width of the field of vision (7.14 ft with a focal length of 50 mm and 3.57 ft with a focal length of 100 mm)
• The height of the field of view (4.77 ft with a focal length of 50 mm and 2.38 ft with a focal length of 100 mm)
• The diagonal of the field of vision (8.58 ft with a focal length of 50 mm and 4.29 ft with a focal length of 100 mm)
• The horizontal angle of the field of view (25.14 ° with a focal length of 50 mm and 12.72 ° with a focal length of 100 mm)
• The vertical angle of the field of view (16.95 ° with a focal length of 50 mm and 8.52 ° with a focal length of 100 mm)
• The angle of the diagonal of the field of view (30.03 ° with a focal length of 50 mm and 15.28 ° with a focal length of 100 mm)
• A simulation of the rendering of the field of vision