Upgrade Guide
Canon EOS R6 Mark III→Canon EOS 40D
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the EOS R6 Mark III. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the EOS 40D
-
StabilisationIBIS added — significant for handheld and video
-
Battery life~800 shots (CIPA) vs ~580 shots (CIPA, LP-E6P)
Unchanged or similar
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Resolution10MP (down from 32MP — 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 R6 Mark III | EOS 40D | |
|---|---|---|---|
| Portrait | -3.9 | ||
| Street | -2.2 | ||
| Travel | -1.9 | ||
| Wedding & Events | -3.9 | ||
| Vlogging & Video | — | ||
| Filmmaking | — | ||
| Documentary | -4.4 | ||
| Sports & Action | -3.1 | ||
| Landscape | -2.9 | ||
| Wildlife | -2.8 | ||
| Casual | -2.9 | ||
| Food | -4.8 | ||
| Macro | -5.5 | ||
| Architecture | -3.5 | ||
| Astrophotography | -1.6 |
Full spec comparison
| Spec | EOS R6 Mark III | EOS 40D | |
|---|---|---|---|
| Price | £2,699 | £26 used | |
| Released | 2025 | 2007 | ↓ |
| Sensor | 32.5MP full-frame stacked CMOS | 10.1MP APS-C CMOS | |
| Resolution | 32MP | 10MP | ↓ |
| Video | 4K 60fps oversampled from 7K, 6K RAW internal | No video | |
| Autofocus | Dual Pixel CMOS AF II — deep-learning subject detection for people, animals and vehicles, up to 40fps tracking | 9-point all cross-type phase-detect via viewfinder; contrast AF in live view | |
| Stabilisation | In-body 5-axis IS, up to 8.5 stops | No IBIS (lens-based stabilisation only) | |
| Burst Rate | 40fps (electronic shutter), 12fps (mechanical) | 6.5fps | ↓ |
| Battery Life | ~580 shots (CIPA, LP-E6P) | ~800 shots (CIPA) | ↑ |
| Weight | 609g (body only) | 820g (with battery) | ↓ |
| Weather Sealed | Yes | Yes | |
| Viewfinder | EVF, 5.76M-dot, up to 120fps | Optical pentaprism, 95% coverage, 0.95x | |
| Screen | 3.2-inch vari-angle touchscreen, 2.1M-dot | 3.0" fixed LCD, 230k dots | |
| Mount | Canon RF | Canon EF / EF-S | |
| Memory Cards | Dual SD / SDHC / SDXC (UHS-II) | Single CompactFlash slot |
Compare side-by-side
⚖️ Compare these cameras
See EOS R6 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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