Upgrade Guide
Sony SLT-A99→Sony RX100
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the SLT-A99. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the RX100
-
StabilisationIBIS added — significant for handheld and video
-
Burst rate10fps (focus fixed at the first frame) vs 6fps with continuous AF (10fps in crop mode)
Unchanged or similar
-
Resolution20MP (down from 24MP — 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 | SLT-A99 | RX100 | |
|---|---|---|---|
| Portrait | -3.1 | ||
| Street | +1.0 | ||
| Travel | +1.3 | ||
| Wedding & Events | -3.8 | ||
| Vlogging & Video | — | ||
| Documentary | -1.3 | ||
| Sports & Action | — | ||
| Landscape | -1.3 | ||
| Wildlife | — | ||
| Casual | +0.6 | ||
| Food | -2.0 | ||
| Macro | -1.5 | ||
| Architecture | -1.9 | ||
| Astrophotography | -2.9 |
Full spec comparison
| Spec | SLT-A99 | RX100 | |
|---|---|---|---|
| Price | £454 used | £74 used | |
| Released | 2012 | 2012 | |
| Sensor | 24.3MP full-frame sensor | 20.2MP 1-inch CMOS | |
| Resolution | 24MP | 20MP | ↓ |
| Video | Full HD 1080p/60 | Full HD 1080p/60 | |
| Autofocus | 19-point phase-detect (11 cross) via the translucent mirror + 102-point on-sensor phase assist, face detection | 25-point contrast-detect AF with face detection | |
| Stabilisation | 4.5-stop sensor-shift SteadyShot INSIDE | Optical SteadyShot (in the lens), no IBIS | |
| Burst Rate | 6fps with continuous AF (10fps in crop mode) | 10fps (focus fixed at the first frame) | ↑ |
| Battery Life | ~500 shots (CIPA) | ~330 shots (CIPA) | ↓ |
| Weight | 812g (with battery and card) | 240g (with battery and card) | ↑ |
| Weather Sealed | Not weather sealed | Not weather sealed | |
| Viewfinder | OLED EVF, 2.36M dots, 100%, 0.71x | No viewfinder | |
| Screen | 3.0" three-way tilting / swivel LCD, 1.23M dots | 3.0" fixed LCD, 1.23M dots | |
| Mount | Sony A-mount | Fixed Zeiss Vario-Sonnar T* 28-100mm f/1.8-4.9 | |
| Memory Cards | Dual slots: SD / Memory Stick + SD | Single SD / Memory Stick slot |
Compare side-by-side
⚖️ Compare these cameras
See SLT-A99 and RX100 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 RX100 against your specific genres — not just specs.
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