Upgrade Guide
Canon EOS M3→Canon EOS-1D X Mark III
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the EOS M3. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the EOS-1D X Mark III
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Weather sealingAdded — fully sealed body
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Burst rate16fps mechanical, 20fps live view vs 4.2fps
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Battery life~2850 shots (CIPA) vs ~250 shots (CIPA)
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Generation5 years newer (2020 vs 2015)
Unchanged or similar
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Resolution20MP (down from 24MP — optimised for low light)
Suitability by genre
| Genre | EOS M3 | EOS-1D X Mark III | |
|---|---|---|---|
| Casual | — | ||
| Travel | — | ||
| Portrait | +0.5 | ||
| Street | — | ||
| Vlogging & Video | +2.5 | ||
| Sports & Action | +6.0 | ||
| Wildlife | — | ||
| Wedding & Events | — | ||
| Landscape | — |
Full spec comparison
| Spec | EOS M3 | EOS-1D X Mark III | |
|---|---|---|---|
| Price | £150 | £3,500 | |
| Released | 2015 | 2020 | ↑ |
| Sensor | 24.2MP APS-C CMOS | 20.1MP full-frame CMOS | |
| Resolution | 24MP | 20MP | ↓ |
| Video | 1080p/30p | 5.5K RAW, 4K 60fps (crop), 4K 60fps (full-frame via firmware) | |
| Autofocus | Hybrid CMOS AF III (phase-detect + contrast-detect) | 191-point all cross-type OVF AF; 525-point Dual Pixel CMOS AF (Live View) | |
| Burst Rate | 4.2fps | 16fps mechanical, 20fps live view | ↑ |
| Battery Life | ~250 shots (CIPA) | ~2850 shots (CIPA) | ↑ |
| Weight | 366g (body only) | 1250g (body only) | ↓ |
| Weather Sealed | No | Yes | ↑ |
| Viewfinder | None (optional EVF-DC1 accessory) | OVF 0.76× magnification, 100% coverage | |
| Screen | 3.0" tilting touchscreen, 1.04M dots | 3.2" fully articulating touchscreen, 4.15M dots | |
| Mount | Canon EF-M mount | Canon EF | |
| Memory Cards | Single SD UHS-I slot | Dual CFexpress Type B slots |
Compare side-by-side
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