objektivbrännvidd

Objektivbrännvidd, often translated as focal length, is a fundamental property of a lens. It describes the distance between the optical center of a lens and the image sensor or film plane when the lens is focused at infinity. This distance is typically measured in millimeters.

The focal length directly influences the angle of view and the magnification of the image. Lenses with shorter focal lengths have a wider angle of view, capturing more of the scene, and are often referred to as wide-angle lenses. Conversely, lenses with longer focal lengths have a narrower angle of view, magnifying distant objects and are known as telephoto lenses.

A standard or "normal" lens, often considered to have a focal length roughly equivalent to the diagonal of the image sensor, provides a perspective that approximates human vision. Zoom lenses allow for a variable focal length, offering flexibility in framing shots without changing lenses. Understanding objectivebrännvidd is crucial for photographers and videographers to achieve desired perspectives and compositions.