Nikon AF DC-Nikkor 105mm f/2 D - Manual (Page 3)

CONTROLLING DEFOCUS IMAGE—MAKING IMAGE BLUR
While pushing the DC ring lock release button, rotate the DC ring toward the R
(rear) side to blur the background, or toward the F (front) side to blur the
foreground (see illust. A). To effectively blur background or foreground images,
turn the DC ring so the f-number on the DC ring (aligned to the DC ring index) is
same as the aperture in use. Turning the ring beyond the aperture in use lets you
create a soft-focus effect.
• Defocus control should always be performed before focusing. If you rotate the
DC ring after focusing, or during focus lock in autofocus photography, your
subject will be out of focus.
• With the DC ring at either the F or R side, the distance scale may not show the
correct distance.
• The effect of defocus image control depends on subject conditions such as
subject-to-background distance, subject-to-foreground distance, etc.
• Image blur cannot be verified through the viewfinder. To obtain the desired
effect, take a series of shots with the DC ring at various settings.
FOCUSING
This lens can be used for both autofocus and manual focus.
To select autofocus, while pressing the A-M ring lock release button, turn the A-
M ring so that “A” aligns with the A-M index. Also, set the camera’s focus mode
selector to autofocus position.
To select manual, turn the A-M ring so “M” aligns with the A-M index. Also, set
the camera’s focus mode selector for manual focus.
• With a Nikon autofocus camera, improperly setting the camera’s focus mode
selector and lens’ A-M ring may damage the camera body.
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