| http://www.w3.org/ns/prov#value | - With such lenses, a fore-aft adjustment capability of about three-sixteenths inch for the objective lenses will accommodate a close-range focus setting for clear viewing of images at about six to twenty feet, such as while watching television, and a long-range focus setting for clear viewing of images at over about twenty feet, such as during a sporting event or theatrical production of the like.
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