Upgrade Guide
Sony A5100→Sony A9 II
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the A5100. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the A9 II
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Weather sealingAdded — fully sealed body
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StabilisationIBIS added — significant for handheld and video
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Burst rate20fps (blackout-free with full AF/AE) vs 6fps
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Battery life~500 shots (CIPA) vs ~400 shots (CIPA)
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Generation5 years newer (2019 vs 2014)
Unchanged or similar
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ResolutionSimilar (24MP)
Suitability by genre
| Genre | A5100 | A9 II | |
|---|---|---|---|
| Casual | — | ||
| Travel | — | ||
| Portrait | +1.5 | ||
| Street | — | ||
| Vlogging & Video | -3.0 | ||
| Landscape | +0.5 | ||
| Sports & Action | +2.5 | ||
| Wildlife | — | ||
| Wedding & Events | — |
Full spec comparison
| Spec | A5100 | A9 II | |
|---|---|---|---|
| Price | £200 | £3,299 | |
| Released | 2014 | 2019 | ↑ |
| Sensor | 24.3MP APS-C Exmor CMOS | 24.2MP Full-Frame Stacked BSI CMOS Exmor RS | |
| Resolution | 24MP | 24MP | ↓ |
| Video | 1080p/60p | 4K/30p, 1080p/120p | |
| Autofocus | Hybrid phase-detect / contrast-detect AF, face detection | 693 phase-detect + 425 contrast-detect, real-time eye/body tracking | |
| Stabilisation | None | IBIS — 5-axis, up to 5.5 stops | |
| Burst Rate | 6fps | 20fps (blackout-free with full AF/AE) | ↑ |
| Battery Life | ~400 shots (CIPA) | ~500 shots (CIPA) | ↑ |
| Weight | 224g (body only) | 678g (with battery and card) | ↓ |
| Weather Sealed | No | Yes | ↑ |
| Viewfinder | None | EVF, OLED 3.69M dots, 0.78× magnification | |
| Screen | 3.0" flip-up touchscreen, 921k dots | 3.0" tilting touchscreen | |
| Mount | Sony E-mount | Sony FE (full-frame E-mount) | |
| Memory Cards | Single SD / MemoryStick PRO Duo slot | Dual SD UHS-II slots |
Compare side-by-side
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