Upgrade Guide
Canon EOS C300 Mark III→Canon EOS R3
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Strong upgrade
The EOS R3 improves across 3 key areas at a reasonable price gap. Most EOS C300 Mark III owners will notice the difference.
What's new in the EOS R3
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Weather sealingAdded — fully sealed body
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StabilisationIBIS added — significant for handheld and video
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Generation1 year newer (2021 vs 2020)
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 C300 Mark III | EOS R3 | |
|---|---|---|---|
| Portrait | — | ||
| Street | — | ||
| Travel | — | ||
| Wedding & Events | — | ||
| Vlogging & Video | — | ||
| Filmmaking | — | ||
| Documentary | — | ||
| Sports & Action | — | ||
| Landscape | — | ||
| Wildlife | — | ||
| Casual | — | ||
| Food | — | ||
| Macro | — | ||
| Architecture | — | ||
| Astrophotography | — |
Full spec comparison
| Spec | EOS C300 Mark III | EOS R3 | |
|---|---|---|---|
| Price | £5,829 | £4,999 | |
| Released | 2020 | 2021 | ↑ |
| Sensor | — | 24.1MP full-frame BSI stacked CMOS | |
| Resolution | — | 24MP | |
| Video | — | 6K RAW, 4K/120p, 1080p/180p | |
| Autofocus | — | Dual Pixel CMOS AF II with Eye Control AF | |
| Stabilisation | — | 8-stop IBIS | |
| Burst Rate | — | 30fps electronic / 12fps mechanical | |
| Battery Life | — | 620 shots (CIPA) | |
| Weight | — | 1015g (body only) | |
| Weather Sealed | Not weather sealed | Yes | ↑ |
| Viewfinder | — | 0.76" OLED EVF, 5.76M dots, 120fps | |
| Screen | — | 3.2" fully articulating touchscreen | |
| Mount | Canon EF | Canon RF | |
| Memory Cards | — | Dual CFexpress Type B |
Compare side-by-side
⚖️ Compare these cameras
See EOS C300 Mark III and EOS R3 next to each other with our interactive comparison tool.
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