Difficult subjects for AF (Auto Focus)

Article ID: ART161477 | Date published: 08/04/2015 | Date last updated: 08/12/2015
 

Description

Difficult subjects for AF (Auto Focus)

Solution

Autofocus can fail to achieve focus (viewfinder’s focus indicator [ ] blinks) with certain subjects such as the following:

  • Very low-contrast subjects
(Example: Blue sky, solid-color walls, etc.)
  • Subjects in very low light
  • Strongly backlit or reflective subjects
(Example: Car with a highly reflective body, etc.)
  • Near and distant subjects framed close to an AF point
(Example: Animal in a cage, etc.)
  • Subjects such as dots of light framed close to an AF point
(Example: Night scenes, etc.)
  • Repetitive patterns
(Example: Skyscraper windows, computer keyboards, etc.)

In such cases, do either of the following:
(1) With One-Shot AF, focus on an object at the same distance as the subject and lock the focus before recomposing the shot
(2) Set the lens’s focus mode switch to [ MF ] and focus manually.

NOTE
Depending on the subject, focus may be achieved by slightly recomposing the shot and performing AF operation again.


Shooting with Focus Lock

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