Focal Length

What is Focal Length?

Focal length is a fundamental concept in optics and photography that refers to the distance between the center of a lens and the focal point, where light rays converge to form a sharp image.

It is typically measured in millimeters (mm) and determines the angle of view and magnification of the lens. A shorter focal length produces a wider angle of view and lower magnification, while a longer focal length produces a narrower angle of view and higher magnification. Focal length is an important consideration when selecting a lens for a specific purpose, such as portrait photography or landscape photography.