Difficult subjects for AF (Auto Focus)
03-Apr-2009
8200493700
Solution
AF (Auto Focus) can fail to achieve focus (the focus confirmation light blinks) on certain subjects such as the following:
- Low-contrast subjects. (ex. blue sky, solid-color walls, etc.)
- Subjects in low light.
- Extremely backlit reflective subjects. (ex. car with a reflective body)
- Overlapping near and far objects. (ex. animal in a cage)
- Repetitive patterns. (ex. Skyscraper windows, computer keyboards, etc.)
In such cases, do either of the following:
- Focus on an object at the same distance as the subject and lock the focus before recomposing. Please see NOTE below about "focus".
- Set the lens focus mode switch to <MF> and focus manually.
NOTE
With [One-Shot AF], while you press the shutter button halfway to focus a still subject, the focus will be locked. You can then recompose the shot and press the shutter button completely to take the picture. This is called "focus lock".(In the < 
> (Sports) mode, AF mode is set to [AI Servo AF] automatically.)
> (Sports) mode, AF mode is set to [AI Servo AF] automatically.)