Focus bracketing is a camera function that automatically takes a series of shots with a gradually shifted focus plane. Instead of a single shot where only a certain part of the scene is sharp, the camera creates several photographs, each focused at a different distance. The user typically sets the initial focus point, the number of shots, and the step size by which the focus shifts between individual shots. The resulting series of photos are then combined on a computer using specialized software into a single resulting image. This process is called "focus stacking," or sharpness stacking. The result is an image with great depth of field, meaning sharpness across the entire desired area from foreground to background, which often could not be achieved with a single exposure.
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