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The Micro-Nikkor 105mm f/2.8 operates continu-
ously 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 fo-
cusing ring until the image on the focusing screen
appears sharp. To keep the focusing ring from mov-
ing, 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 re-
quired. (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.
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