Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 956)

External Speedlite
Compatible Speedlites EL/EX series Speedlites
Flash metering E-TTL II autoflash
Flash exposure compensation ±3 stops in 1/3- or 1/2-stop increments
FE lock Available
PC terminal Available
Flash control Flash function settings, Flash Custom Function settings
Movie recording
Normal movies
Canon Log
Off On
Recording format MP4
Compression MPEG-4 H.264/AVC MPEG-4 H.265/HEVC
Video signal recording range Full range (0–255) Full range (128–1016)
Color sampling YCbCr 4:2:0 (8-bit) YCbCr 4:2:2 (10-bit)
Color Matrix Rec.ITU-R BT.709 Rec.ITU-R BT.709/BT.2020
Audio
ALL-I/IPB AAC/Linear PCM*
IPB (Light) AAC
* AAC or Linear PCM can be selected in [ C.Fn7-7 : Audio compression ]
RAW movies
Canon Log
Off On
Recording format RAW (12-bit)
Audio Linear PCM
Movie recording size
RAW (5472×2886), 4K DCI (4096×2160), 4K DCI cropped (4096×2160), 4K UHD
(3840×2160), Full HD (1920×1080)
Frame rate
119.9p/59.94p/29.97p/24.00p/23.98p (with NTSC)
100.0p/50.00p/25.00p/24.00p (with PAL)
* 119.9p/100.0p used for High Frame Rate movies
Compression method ALL-I (For editing), IPB (Standard), IPB (Light)
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