EOS-1D X Mark III
 
                            
                            
                        | AF Modes | OVF: One-Shot AF, AI Servo AF, Manual Live View: One-Shot AF, Servo AF | 
| AF Point Selection | Automatic selection, Manual selection | 
| AF System Points | OVF: 191 points max. (Cross-type AF points: 155 points max.) / Live View: Max. 3869 selectable AF point positions / Up to 525 AF areas (Auto selection) | 
| Built-in Flash | - | 
| Closest Focusing Distance (cm) | - | 
| Continuous Shooting Speed (Shots Per Sec) (Up To) | OVF:  Up to 16 (One-Shot AF/ AI Servo AF) Live View: Up to 20 (One-Shot AF/ Servo AF) | 
| Digital Zoom | - | 
| Dimensions (Excl. Protrusions) (mm) (Approx.) | Approx. 158.0 × 167.6 × 82.6 | 
| Drive System | - | 
| Effective ISO | Stills: 100 -102,400 (L:50, H1:204,800, H2:409,600, H3:819,200) Movie: 100-25,600 (H1:204,800) | 
| Effective Pixels (Megapixels) | 20.1 | 
| Exposure Compensation | Stills, OVF: Manual: ±5 stops in 1/3-stop or 1/2-stop increments, Stills, Live View and movie recording: ±3 stops in 1/3-stop or 1/2-stop increments, AEB: ±3 stops in 1/3-stop or 1/2-stop increments | 
| Eye Detection AF | Live View: One-Shot AF / Servo AF | 
| Flash Modes | E-TTL II , Manual, Multi, Ext A, Ext M | 
| Focal Length (35mm Equivalent) | - | 
| Guide Number ISO 100 metres | - | 
| Image Resolution | 5472×3648 (L), 4368×2912 (M1), 3648×2432 (M2), 2736×1824 (S), 5472×3648 (HEIF), 5472×3648 (RAW/C-RAW) | 
| In-body Image Stabilizer (sensor shift IS) | No | 
| LCD Monitor (Size) (Inch) | 3.15 | 
| LCD Monitor Resolutions (dots) | 2,100,000 | 
| Manual Focus | Yes | 
| Memory Card Type | Supports 2 memory cards: 2x CFexpress memory card up to 2TB size | 
| Metering Mode | OVF: Evaluative, Partial, Spot, Spot metering linked to AF point, Multi-spot, Centre-weighted average Live View: Evaluative, Partial, Spot Movie: Center-weighted average and Evaluative | 
| Movie Digital IS | Yes | 
| Movie Format | MP4, RAW | 
| Optical Image Stabilizer | No | 
| Optical Zoom | - | 
| Optional Power | AC Power (AC adapter AC-E19 & DC coupler DR-E19) | 
| Peripheral Connections | USB-Type C, HDMI (Type C), System extension terminal, Mic-in , headphone, Remote control terminal, RJ-45 terminal, PC terminal | 
| Processor Type | DIGIC X | 
| Sensor Size | Full-Frame CMOS | 
| Shooting Modes | Stills: Program AE, Shutter-priority AE, Aperture-priority AE, Manual exposure, Bulb exposure, Custom shooting modes (C1/C2/C3) Movie recording: Program AE, Shutter-priority AE, Aperture-priority AE, Manual exposure, Custom shooting modes (C1/C2/C3) | 
| Shutter Speed Range (Sec.) | 30 - 1/8000 Bulb | 
| Silent Shutter | Available: Single / Continuous Shot | 
| Standard Power Supply | Battery Pack LP-E19 | 
| Still Image Format | JPEG, RAW, C-RAW, HEIF, RAW + JPEG, C-RAW+JPEG , RAW+HEIF, C-RAW+HEIF | 
| Viewfinder Coverage (Approx.) | 100% | 
| Viewfinder Type | Eye-level pentaprism | 
| Weight (g) (Including the battery and memory card) (Approx.) *For camera kits, weight includes kit lens(es). | 1440 | 
| White Balance | Auto (Ambience priority), Auto (White priority), Preset (Daylight, Shade, Cloudy, Tungsten light, White fluorescent light, Flash), Custom 1-5, Color temperature setting (approx. 2500–10000 K) White balance correction and white balance bracketing features provided*2 | 
| X-sync (sec.) | 1/250 | 
*1 Type B: Dual card slots
*2 Flash color temperature information transmission possible