Difficult subjects for AF (Auto Focus) (EOS 5DS / EOS 5DS R)

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

Subjects Difficult to Focus

(Example: Blue skies, solid-color flat surfaces, etc.)

(Example: Cars with highly reflective bodies, etc.)

(Example: Animals in cages, etc.)

(Example: Night scenes, etc.)

(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 lens’s focus mode switch to [MF] and focus manually.

Caution