EOS-1D X Mark IIIvs FX3
Canon
EOS-1D X Mark III (2020)
Starting from £3500 new
Best for Professional Sports, Wildlife & Press Photography
View EOS-1D X Mark III
Sony
FX3 (2021)
Starting from £3799 new
Best for Professional video, documentary & cinematic filmmaking
View FX3
GearScore™ Verdict — Which should you buy?
Professional Sports, Wildlife & Press Photography — EOS-1D X Mark III (2020): Canon's DSLR masterpiece — 20fps live view, 5.5K RAW, 191 cross-type AF points, and dual CFexpress. Almost certainly the finest optical viewfinder camera ever made.
Professional Video, Documentary & Cinematic Filmmaking — FX3 (2021): The definitive run-and-gun cinema camera — A7S III sensor quality in a body built specifically for video professionals.
Who should buy what
EOS-1D X Mark III (2020)
- Sports and wildlife photographers with a Canon EF lens collection
- Professionals who prefer the optical viewfinder experience
- Press photographers who need 20fps, weather sealing, and Ethernet
- Canon historians who want to mark the end of the EOS-1D DSLR era
FX3 (2021)
- Professional videographers and filmmakers who need cinema-quality colour science in a compact body
- Documentary and run-and-gun shooters who need 4K/120p and built-in XLR audio
- Sony A7S III owners who want a purpose-built video body alongside their stills camera
- Gimbal and drone operators who need a compact full-frame cinema camera
Quick take: The eos-1d x mark iii has the highest resolution at 20mp; the eos-1d x mark iii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS-1D X Mark III (2020) | FX3 (2021) |
|---|---|---|
| Price | £3,500 | £3,799 |
| Sensor | 20.1MP full-frame CMOS | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) |
| Resolution | 20.1MP | 12.1MP |
| Video | 5.5K RAW, 4K 60fps (crop), 4K 60fps (full-frame via firmware) | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone |
| Autofocus | 191-point all cross-type OVF AF; 525-point Dual Pixel CMOS AF (Live View) | Real-time tracking with subject recognition (human, animal) |
| Stabilisation | — | 5-axis IBIS — 5 stops |
| Burst Rate | 16fps mechanical, 20fps live view | 10fps mechanical, 10fps electronic |
| Battery Life | ~2850 shots (CIPA) | ~640 shots (CIPA) |
| Weight | 1250g (body only) | 715g body only (with XLR handle) |
| Dimensions | 158 × 167.6 × 82.6mm | 129.7 × 78.0 × 84.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | OVF 0.76× magnification, 100% coverage | None — monitor/external EVF use only |
| Screen | 3.2" fully articulating touchscreen, 4.15M dots | 3.0" touchscreen, fully articulating |
| Mount | Canon EF | Sony FE mount (full-frame E-mount) |
| Memory Cards | Dual CFexpress Type B slots | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | Wi-Fi 5GHz, Bluetooth 4.2, USB-C 3.1 Gen 2, Ethernet | USB-C (10Gbps), full-size HDMI, XLR via handle, Bluetooth, Wi-Fi |
Suitability by genre
| Genre | EOS-1D X Mark III | FX3 |
|---|---|---|
| Sports & Action | — | |
| Wildlife | — | |
| Wedding & Events | — | |
| Portrait | ||
| Vlogging & Video | ||
| Street | ||
| Landscape | — | |
| Low Light | — | |
| Wedding | — | |
| Travel | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with EOS-1D X Mark III
Camera family history