Canon EOS Rebel T6i W Instruction Manual

110Autofocus can fail to achieve focus (viewfinder’s focus indicator <o>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 asthe subject and lock the focus before recomposing the shot(p.69).(2) Set the lens’s focus mode switch to <MF> and focus manually.Subjects Difficult to Focus on Depending on the subject, focus may be achieved by slightlyrecomposing the shot and performing AF operation again. Conditions that make focusing difficult with AF during Live View shootingor movie shooting are listed on page 212.