Canon EOS 90D Advanced User's Manual page 278

Movie Recording
ISO Speed in Basic Zone Modes
The ISO speed will be set automatically within ISO 100–12800.

ISO Speed in the < d >, < s >, < f >, and < F > Modes
Will be set according to the details of [ z : k ISO speed settings]

( = 322).
When the < 8 > mode is set, HDR movie recording takes eff ect ( = 284).
o
Even if you set the < s > or < f > mode, movie recording with priority given
o
to shutter speed or aperture cannot be performed. Autoexposure recording
takes eff ect as in the < d > mode.
Regarding the ISO speed for time-lapse movie recording, see = 322.
o
Recording in Basic Zone modes produces the same results as for < A >
o
mode. In the < A > mode, the scene icon detected by the camera is displayed
in the upper left of the screen ( = 627).
In Creative Zone modes, you can press the < A > button ( = 161) to lock the
o
exposure (AE lock). After applying AE lock during movie recording, you can
cancel it by pressing the < S > button. (AE lock setting is retained until you
press the < S > button.)
Exposure compensation in Creative Zone modes can be set in a range of up
o
to ±3 stops.
ISO speed, shutter speed, and aperture are not recorded in movie Exif
o
information.
With autoexposure movie recording (except in time-lapse movie recording),
o
this camera supports the Speedlite's function to turn on the LED light
automatically in low-light conditions. For details, refer to the Instruction Manual
of the EX-series Speedlite equipped with an LED light.
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