Nikon AF-S DX Micro-NIKKOR 85mm f-3.5G ED VR - Manual (Page 16)

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■ Setting the aperture
Use the camera to adjust the aperture setting. When exposure (or
shooting) mode is set at “A” or “M”, the camera will control aperture to
maintain the effective f-number (up to approx. 1.1 stops) even if shooting
distance is changed.
■ Depth of field
If your camera supports depth-of-field preview, the effects of the
aperture setting can be previewed in the viewfinder before shooting.
This lens is equipped with the Internal Focusing (IF) system. As the
shooting distance decreases, the focal length also decreases.
■ Focusing at a predetermined reproduction ratio
(Reproduction ratio scale)
The reproduction ratio is the relation between the size of the image
recorded on the image sensor and the actual subject size. If, for example,
the image on the image sensor is one-fifth the actual subject size, the
reproduction ratio is 1:5.
To photograph at a predetermined reproduction ratio, use the following
procedure:
1 Manually turn the focus ring until the desired reproduction ratio scale
number is aligned with the distance index line c.
2 Aim at the subject, then change your position, moving closer to or
farther away from the subject, until the image in the viewfinder
sharpens.
■ Notes on close-up photography and reproduction
work
Camera shake
This lens provides such exceptionally high image magnification that
even the slightest movement during shooting can cause the image to
blur. Therefore, the use of a tripod and a cable release or remote cord is
highly recommended to prevent the effects of camera shake.
Close working distance
At the high reproduction ratios used in close-up shooting, the depth of
field is very shallow. To ensure sufficient depth of field, stop down the
lens, extend the exposure time, and carefully position the camera so that
the most important portion of the subject is parallel to the surface of the
image sensor to ensure sharp focus.