Canon EOS 80D - Manual (Page 191)

189
Focusing with AF (AF Method)
 If focus is not achieved with the shooting conditions listed on the
preceding page, set the lens’s focus mode switch to <MF> and focus
manually.
 Depending on the lens used, focusing may take longer or correct focus
may not be achieved. For details, refer to the Canon website.
 If you shoot a peripheral subject and it is slightly out of focus, aim the
center AF point or zone over the subject to focus, focus again and then
take the picture.
 The AF-assist beam will not be emitted. However, if an EX-series
Speedlite (sold separately) equipped with an LED light is used, the LED
light will turn on for AF-assist when necessary.
 In magnified view, achieving focus becomes more difficult due to camera
shake. Using a tripod is recommended.