Menu Function Settings - Canon EOS Rebel T6i W Instruction Manual

Menu Function Settings

3
Z1
AF method

The AF methods are the same as described on pages 206-213. You
can select [u+Tracking], [FlexiZone - Multi], or [FlexiZone -
Single].
Movie Servo AF

During movie shooting, the camera focuses on the subject
continuously. The default setting is [Enable].
When [Enable] is set:

The camera focuses on the subject continuously even when you
are not pressing the shutter button halfway.

Since this drives the lens continuously, it will consume battery
power and shorten the total possible movie shooting time (p.235).

With certain lenses, the lens mechanical sound during focusing
may be recorded. If this happens, use the Directional Stereo
Microphone DM-E1 (sold separately) to reduce the lens
mechanical sound in the movie. Also, using certain STM lenses
(for example, the EF-S18-55mm f/3.5-5.6 IS STM) will reduce lens
operation noise.

If you want to set the lens's focus mode switch to <MF> during
Movie Servo AF, first set the power switch to <1>.
248
When you set the power switch to <k>,
the [Z1] and [Z2] tabs will show
functions dedicated to movie shooting.