Upgrade Guide
Canon EOS-1D X Mark III→Canon EOS 40D
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Situational
One clear hardware improvement over the EOS-1D X Mark III. Worth it if that specific upgrade aligns with what you shoot.
What's new in the EOS 40D
-
StabilisationIBIS added — significant for handheld and video
Unchanged or similar
-
Resolution10MP (down from 20MP — optimised for low light)
Suitability by genre
Base scores — computed from verified specs for an enthusiast shooting photo and video. The Upgrade Checker adjusts them for your skill level.
| Genre | EOS-1D X Mark III | EOS 40D | |
|---|---|---|---|
| Portrait | -1.5 | ||
| Street | +0.4 | ||
| Travel | +0.5 | ||
| Wedding & Events | -2.6 | ||
| Filmmaking | — | ||
| Documentary | -2.7 | ||
| Sports & Action | -1.6 | ||
| Landscape | -1.3 | ||
| Wildlife | -1.0 | ||
| Casual | -0.6 | ||
| Food | -1.3 | ||
| Macro | -0.7 | ||
| Architecture | -1.6 | ||
| Astrophotography | -1.5 |
Full spec comparison
| Spec | EOS-1D X Mark III | EOS 40D | |
|---|---|---|---|
| Price | £6,999 | £26 used | |
| Released | 2020 | 2007 | ↓ |
| Sensor | 20.1MP full-frame CMOS | 10.1MP APS-C CMOS | |
| Resolution | 20MP | 10MP | ↓ |
| Video | 5.5K RAW, 4K 60fps (crop), 4K 60fps (full-frame via firmware) | No video | |
| Autofocus | 191-point all cross-type OVF AF; 525-point Dual Pixel CMOS AF (Live View) | 9-point all cross-type phase-detect via viewfinder; contrast AF in live view | |
| Stabilisation | — | No IBIS (lens-based stabilisation only) | |
| Burst Rate | 16fps mechanical, 20fps live view | 6.5fps | ↓ |
| Battery Life | ~2850 shots (CIPA) | ~800 shots (CIPA) | ↓ |
| Weight | 1250g (body only) | 820g (with battery) | ↑ |
| Weather Sealed | Yes | Yes | |
| Viewfinder | OVF 0.76× magnification, 100% coverage | Optical pentaprism, 95% coverage, 0.95x | |
| Screen | 3.2" fixed touchscreen, 4.15M dots | 3.0" fixed LCD, 230k dots | |
| Mount | Canon EF | Canon EF / EF-S | |
| Memory Cards | Dual CFexpress Type B slots | Single CompactFlash slot |
Compare side-by-side
⚖️ Compare these cameras
See EOS-1D X Mark III and EOS 40D 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 40D against your specific genres — not just specs.
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