Upgrade Guide
Canon EOS-1D 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 Mark III. Worth it if that specific upgrade aligns with what you shoot.
What's new in the EOS 40D
-
Weather sealingAdded — fully sealed body
Unchanged or similar
-
ResolutionSimilar (10MP)
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 Mark III | EOS 40D | |
|---|---|---|---|
| Portrait | -0.4 | ||
| Street | +0.5 | ||
| Travel | +1.1 | ||
| Wedding & Events | -1.0 | ||
| Documentary | +0.8 | ||
| Sports & Action | -0.5 | ||
| Landscape | +0.7 | ||
| Wildlife | +0.1 | ||
| Casual | +0.4 | ||
| Food | +0.1 | ||
| Macro | +0.1 | ||
| Architecture | -0.1 | ||
| Astrophotography | -0.4 |
Full spec comparison
| Spec | EOS-1D Mark III | EOS 40D | |
|---|---|---|---|
| Price | £102 used | £26 used | |
| Released | 2007 | 2007 | |
| Sensor | 10.1MP APS-H CMOS | 10.1MP APS-C CMOS | |
| Resolution | 10MP | 10MP | |
| Video | No video | No video | |
| Autofocus | 45-point phase-detect (19 cross-type + 26 assist) via viewfinder | 9-point all cross-type phase-detect via viewfinder; contrast AF in live view | |
| Stabilisation | No IBIS (lens-based stabilisation only) | No IBIS (lens-based stabilisation only) | |
| Burst Rate | 10fps | 6.5fps | ↓ |
| Battery Life | ~2200 shots (CIPA) | ~800 shots (CIPA) | ↓ |
| Weight | 1155g (body only) | 820g (with battery) | ↑ |
| Weather Sealed | Not weather sealed | Yes | ↑ |
| Viewfinder | Optical pentaprism, 100% coverage, 0.76x | Optical pentaprism, 95% coverage, 0.95x | |
| Screen | 3.0" fixed LCD, 230k dots | 3.0" fixed LCD, 230k dots | |
| Mount | Canon EF | Canon EF / EF-S | |
| Memory Cards | Dual slots: CompactFlash + SD | Single CompactFlash slot |
Compare side-by-side
⚖️ Compare these cameras
See EOS-1D Mark III and EOS 40D next to each other with our interactive comparison tool.
Get a personalised upgrade score
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Tell us what you shoot and we'll score the EOS 40D against your specific genres — not just specs.
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