Aspect Ratio - Canon EOS 5D Mark III Instruction Manual

3 Menu Function Settings
Aspect ratioN
The image's aspect ratio can be set to [3:2], [4:3], [16:9], or [1:1].
The area surrounding the Live View image is masked in black when
the following aspect ratios are set: [4:3] [16:9] [1:1].
JPEG images will be saved with the set aspect ratio. RAW images
will always be saved with the [3:2] aspect ratio. Since the aspect
ratio information is appended to the RAW image, the image can be
generated in the respective aspect ratio when you process the RAW
image with the provided software.
When [83: Add cropping information] is not set to [Off], the
aspect ratio will be 3:2. (The aspect ratio cannot be changed.)
Image
Quality
3:2
5760x3840
3
(22.1 megapixels)
1
3840x2560
4
(9.8 megapixels)
3960x2640
41
(10.5 megapixels)
2880x1920
a
(5.5 megapixels)
2880x1920
61
(5.5 megapixels)
1920x1280
b
(2.5 megapixels)
720x480
c
(350,000 pixels)
206
Aspect Ratio and Pixel Count (approx.)
4:3
5120x3840
(19.7 megapixels)
3408x2560*
(8.7 megapixels)
3520x2640
(9.3 megapixels)
2560x1920
(4.9 megapixels)
2560x1920
(4.9 megapixels)
1696x1280*
(2.2 megapixels)
640x480
(310,000 pixels)
16:9
5760x3240
(18.7 megapixels)
3840x2160
(8.3 megapixels)
3960x2228*
(8.8 megapixels)
2880x1624*
(4.7 megapixels)
2880x1620
(4.7 megapixels)
1920x1080
(2.1 megapixels)
720x400*
(290,000 pixels)
1:1
3840x3840
(14.7 megapixels)
2560x2560
(6.6 megapixels)
2640x2640
(7.0 megapixels)
1920x1920
(3.7 megapixels)
1920x1920
(3.7 megapixels)
1280x1280
(1.6 megapixels)
480x480
(230,000 pixels)