| http://www.w3.org/ns/prov#value | - Although a lens can precisely focus at only one distance at a time, the decrease in sharpness is gradual on each side of the focused distance, so that within the DOF, the unsharpness is imperceptible under normal viewing conditions. * Motion Focusing (Zoom Blur) can add an abstract quality to a variety of subjects including statues, windows and flowers.
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