Upgrade Guide
Canon EOS-1D X Mark III→Canon EOS R100
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
→
Strong upgrade
The EOS R100 improves across 3 key areas at a reasonable price gap. Most EOS-1D X Mark III owners will notice the difference.
What's new in the EOS R100
-
Resolution24MP vs 20MP (+4MP)
-
StabilisationIBIS added — significant for handheld and video
-
Generation3 years newer (2023 vs 2020)
Unchanged or similar
-
Weather sealingNot present in new body
Suitability by genre
| Genre | EOS-1D X Mark III | EOS R100 | |
|---|---|---|---|
| Sports & Action | — | ||
| Wildlife | -5.0 | ||
| Wedding & Events | — | ||
| Portrait | +1.0 | ||
| Vlogging & Video | — | ||
| Street | — | ||
| Landscape | — | ||
| Travel | — | ||
| Video | — |
Full spec comparison
| Spec | EOS-1D X Mark III | EOS R100 | |
|---|---|---|---|
| Price | £3,500 | £529 | |
| Released | 2020 | 2023 | ↑ |
| Sensor | 20.1MP full-frame CMOS | 24.1MP APS-C CMOS | |
| Resolution | 20MP | 24MP | ↑ |
| Video | 5.5K RAW, 4K 60fps (crop), 4K 60fps (full-frame via firmware) | 4K/30p (slight crop), 1080p/60p | |
| Autofocus | 191-point all cross-type OVF AF; 525-point Dual Pixel CMOS AF (Live View) | Dual Pixel CMOS AF, face detection, subject tracking | |
| Stabilisation | — | None (no IBIS) | |
| Burst Rate | 16fps mechanical, 20fps live view | 6.5fps mechanical | ↓ |
| Battery Life | ~2850 shots (CIPA) | ~270 shots (CIPA) | ↓ |
| Weight | 1250g (body only) | 356g (body, battery, card) | ↑ |
| Weather Sealed | Yes | No | ↓ |
| Viewfinder | OVF 0.76× magnification, 100% coverage | EVF, 2.36M dots, 0.59× magnification | |
| Screen | 3.2" fully articulating touchscreen, 4.15M dots | 3.0" fixed touchscreen, 1.04M dots | |
| Mount | Canon EF | Canon RF-mount | |
| Memory Cards | Dual CFexpress Type B slots | Single SD UHS-II |
Compare side-by-side
⚖️ Compare these cameras
See EOS-1D X Mark III and EOS R100 next to each other with our interactive comparison tool.
Get a personalised upgrade score
Run the upgrade checker →
Tell us what you shoot and we'll score the EOS R100 against your specific genres — not just specs.
Other upgrades from the EOS-1D X Mark III
Related buying guides
Camera family history