fältvinkel

Fältvinkel, which translates to "field angle" in English, is a term used in optics and photography. It refers to the angle of the cone of light that can pass through an optical system, such as a lens or a telescope. This angle determines the extent of the scene that is captured by the optical instrument. A wider fältvinkel means a broader view of the subject, often described as a wider field of view. Conversely, a narrower fältvinkel results in a more limited, magnified view.

In photography, the fältvinkel is directly related to the focal length of the lens and the size of the image sensor. Shorter focal lengths produce wider fältvinklar, capturing more of the scene, which is characteristic of wide-angle lenses. Longer focal lengths result in narrower fältvinklar, magnifying distant objects and are typical of telephoto lenses. The fältvinkel is often expressed in degrees and is a crucial specification for selecting the appropriate lens for a particular photographic application, whether it be landscape photography, portraiture, or astrophotography. Understanding the fältvinkel helps photographers predict how much of their surroundings will be included in the final image.