Special Focusing Situations - Nikon F70 Instruction Manual

SPECIAL FOCUSING SITUATIONS

Autofocus operation depends on general lighting, subject contrast and detail,
and other technical factors. In rare situations where autofocus (and manual
focus with Electronic Rangefinder) is not possible,
focus manually with clear matte field (p. 42) or perform autofocus on another
subject located at same distance.
A. Very dark subject B. Low-contrast subject
Focus manually with clear matte field, or Focus manually with clear matte field, or
for Single Servo AF, focus on another for Single Servo AF, focus on another
brighter subject located at same subject at same distance but with more
distance, lock focus, then recompose contrast, lock focus, then recompose
(pp. 36-37). Or, use a Nikon AF (pp. 36-37).
Speedlight (SB-28, SB-27, SB-26,
SB-25, SB-23, SB-22s, SB-22 or SB-20)
to perform autofocus with Speedlight's
AF illuminator.
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In the following situations, ignore in-focus indicator .
• Scene with subject located at different distances. (For
blinks telling you to example, when shooting a person over a fence or when
shooting animals inside a cage)
Use Spot Area for autofocus (page 30) or focus manually with
clear matte field.
• With an extremely bright object near your subject
Use Spot Area for autofocus (page 30) or focus manually with
clear matte field.
• When using a linear polarizing filter*, or other special filter
such as a soft-focus filter.
Focus manually with clear matte field.
* Circular polarizing filter can be used in connection with autofocus operation.
C. Strongly backlit subject or bright
subject with shiny surface such as
silver or aluminum, or scene in which
there is a pronounced difference in
brightness.
Focus manually with clear matte field.
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