Canon EOS R5 C VR Creator Kit with RF 5.2mm f/2.8 Dual Fisheye Lens - Manual (Page 137)

Still Photo Cropping/Aspect Ratio
Normally with RF or EF lenses, images are captured at the sensor size of approx.
36.0×24.0mm in full-frame shooting, but in cropped shooting, you can isolate and magnify
the center of the image approx. 1.6 (APS-C size) as if using a telephoto lens, or you can set
an aspect ratio as needed before shooting. EF-S lenses capture a 3:2 area in the center,
magnified approx. 1.6× (APS-C size).
1.
Select [ : Cropping/aspect ratio].
2.
Select an option.
Select [ Full-frame ], [ 1.6x (crop) ], [ 1:1 (aspect ratio) ], [ 4:3 (aspect
ratio) ], or [ 16:9 (aspect ratio) ].
With EF-S lenses, [ 1.6x (crop) ] is set automatically, and no other
option is available.
To proceed without changing shooting area display, press <
> and
go to step 4.
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