Canon EOS RP Instruction Manual page 797

In [ M ] Mode
For Full HD/HD movies with ISO speed set to [AUTO], ISO speed is
z
automatically set in a range of ISO 100–25600.
For 4K movies with ISO speed set to [AUTO], ISO speed is automatically
z
set in a range of ISO 100–12800.
When setting ISO Auto, setting [Max for Auto] or [ H Max for Auto]
z
under [ z : k ISO speed settings] to [H2(102400)] ( = 286) expands
the maximum limit of the automatic ISO speed setting range to H2
(equivalent to ISO 102400). You can lower the maximum value to narrow
the automatic ISO speed setting range.
You can set the ISO speed manually in a range of ISO 100–25600 for
z
Full HD/HD movies and ISO 100–12800 for 4K movies. Note that under
[ z : k ISO speed settings], setting [ISO speed range] or [Range for
H ] to [H2(102400)] ( = 286) expands the maximum limit of the manual
ISO speed setting range to H2 (equivalent to ISO 102400). Note that you
can also set the [Maximum] and [Minimum] to a range narrower than
the default range.
If [ z : Highlight tone priority] is set to [Enable] ( = 137), the
z
automatic and manual ISO speed setting range's minimum limit will be
ISO 200. Even when ISO speed expansion is set, the maximum limit will
not be expanded.
Performance Data
589