Difficult subjects for AF (Auto Focus) (EOS 7D Mark II) Last Updated : 18-Sep-2014 Issue Number : 8202193800 Solution Autofocus can fail to achieve focus (viewfinders focus indicator <> blinks) with certain subjects such as the following: Subjects Difficult to Focus Subjects with very low contrast (Example: Blue skies, solid-color flat surfaces, etc.) Subjects in very low light Strongly backlit or reflective subjects (Example: Cars with highly reflective bodies, etc.) Near and distant subjects framed close to an AF point (Example: Animals in cages, 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, focus by doing either of the following: (1) With One-Shot AF, focus on an object at the same distance as the subject and lock the focus, then recompose the shot. (2) Set the lenss focus mode switch to and focus manually. NOTE Depending on the subject, focus may be achieved by slightly recomposing the shot and performing AF operation again.