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The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light.
The focal length of an optical system is a measure of how strongly it focuses or defocuses light.
2 lut 2024 · The focal length of a lens is the optical distance from the point where the light meets inside the lens to the camera’s sensor. What difference does this make? Read our handy guide to be in the know
The focal length of a lens is a fundamental parameter that describes how strongly it focuses or diverges light. A large focal length indicates that light is bent gradually while a short focal length indicates that the light is bent at sharp angles.
18 wrz 2023 · The exact definition is: Focal length measures the distance, in millimeters, between the “nodal point” of the lens and the camera’s sensor. “Nodal point” may sound complicated, but it is simply the point where light converges in a lens. Here’s a simple diagram showing the focal length of a lens, based upon this definition:
Focal length controls the angle of view and magnification of a photograph. Learn when to use Nikon zoom and prime lenses to best capture your subject.
What is focal length, and how does it determine whether your camera captures a wide vista or a close-up of a distant subject? What do prime, zoom, wide-angle and telephoto mean? Find out here!
