Nikon 1988 Instruction Manual - Page 7

The Micro-Nikkor 105mm f/2.8 operates continuously from infinity («>) to 0.41m (1.34ft) for a reproduction ratio of 1:2. With the PN-11 ring attached, focusing is extended to a reproduction ratio of 1:0.88. To focus, first make sure that the tightening screw on the focusing ring is loosened. Then, turn the focusing ring until the image on the focusing screen appears sharp. To keep the focusing ring from moving, be sure to tighten the screw. The tightening screw makes it difficult to accidentally move the focusing ring, but it does not lock it in place. The distance scale on the focusing ring is marked in both meters (white) and feet (yellow). These figures indicate the distance from the subject to the camera's film plane. The exact position of the film plane is indicated on all cameras for convenience when precise measurement of the distance is required. (For more details, check your camera's instruction manual). • Although it is possible to turn the focusing ring with the screw tightened, do not attempt it. • At the closest distance setting, the lens focal length is approx. 82mm. 7