2025 Travelers' Choice
| Comparison Chart | EOS-1D X MARK III | EOS-1D X MARK II |
| Image Sensor | Full-frame CMOS | Full-frame CMOS |
| Megapixels | 20.1 | 20.2 |
| Image Processor | DIGIC X | Dual DIGIC 6+ |
| ISO (Extended) | 100-102,400 (819,200) | 100-51,200 (409,600) |
| Max. Frame Rate (VF/Live View) | 16 fps/20 fps | 14 fps/16 fps |
| AF points | 191 (155 cross-type) | 61 (41 cross-type) |
| Image File Format | JPEG, HEIF, RAW | JPEG, RAW |
| Memory Card | Dual CFexpress | CompactFlash + CFast |
| Video Resolution | 1080p @ 120p, 4K @ 60p, 5.5K RAW @ 60p, 10-bit 4:2:2 with Canon Log | 4K @ 60fps |
| LCD | 3.2″, 2.1 million dots | 3.2″, 1.6 million dots |
| Buffer | 1000+ in RAW | 170+ in RAW |
| Metering Sensor | 400,000 pixel RGB+IR | 360,000 pixel RGB+IR |
| Wi-Fi | Yes | No |
| GPS | Yes | Yes |
| Weight | 1,440g | 1,550g |