Fokallængdemåling
Fokallængdemåling, also known as focal length measurement, is a crucial technique in optics and photography. It refers to the process of determining the focal length of a lens or an optical system. The focal length is a fundamental property that defines how strongly a lens converges or diverges light, and it directly influences the magnification and field of view of an optical instrument.
There are several methods for focal length measurement. One common approach involves using a distant object,
Another technique utilizes the lens formula, which relates the object distance (u), image distance (v), and focal
In photography, focal length is often expressed in millimeters and is a key specification for lenses. It