Canon EOS R5 C User Manual page 140

When [1.6x (crop)] is set or an EF-S lens is used, an image magnified
approx. 1.6× is displayed.
When [1:1 (aspect ratio)], [4:3 (aspect ratio)], or [16:9 (aspect ratio)]
is set, the image within the black masked or outlined area is captured.
Caution
Areas outside the cropped area are not recorded in RAW shooting when [1.6x
(crop)] is set, or with EF-S lenses.
[Shooting area] has no effect on display when [1.6x (crop)] is set, or with EF-S
lenses.
[ : Add cropping information] is only available when [Full-frame] is set.
When external flash units are used, flash auto zoom (automatic adjustment of flash
coverage) based on the [
Note
For details on pixel counts when cropping or an aspect ratio is set, see
pixel count.
Nearly 100% field of view coverage is maintained vertically and horizontally when
cropping or an aspect ratio is set.
Aspect ratio information is added to RAW images when an aspect ratio is set,
which are captured at full size. When the RAW images are played back, the image
area used for shooting is indicated by lines. Note that only the shooting image area
is shown in Slide Show.
: Cropping/aspect ratio] setting is not performed.
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Still photo