Difficult subjects for AF (Auto Focus) (EOS REBEL T5/EOS 1200D)
04-Feb-2014
8202021100
Solution
AF (Auto Focus) can fail to achieve focus (the focus confirmation light [ 
] blinks) on certain subjects such as the following:
] 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)
- Near and far subjects covered by an AF point
-(Example: Animals in cages, etc.)
- Repetitive patterns. (ex. Skyscraper windows, computer keyboards, etc.)
In such cases, do either of the following:
- With One-Shot AF, focus on an object at the same distance as the subject and lock the focus before recomposing the shot.
- 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". For further information, please refer to the Related Information section. (In the < 
> (Sports) mode, AF mode is set to [AI Servo AF] automatically.)
> (Sports) mode, AF mode is set to [AI Servo AF] automatically.)