Focal Length and Aperture Explained for the Photography Novice

Focal Length The focal length of a lens determines its angle of view, and also how much the subject will be magnified for a given photographic position. Focal length also determines the perspective of an image. Longer focal lengths require shorter exposure times to minimize burring caused by the shake of hands. The Focal Length means how much can your camera see. Aperture   The aperture range of a lens refers to the amount of light that the diaphragm can let inside the camera to reach the sensor. Apertures are listed in terms of f-numbers (expresses the diameter of the entrance pupil in terms of the effective focal length of the lens; It is the quantitative measure of lens speed), which are marked on the lens. On a camera, the f-number is usually adjusted in f-stops. Each “stop” is marked with its corresponding f-number, and represents a halving of the … Read more

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