Decision tools · Compare
A9 vs RX100
Quick take: The A9 has the highest resolution at 24MP; the RX100 is the most affordable; only the A9 is weather sealed.
16 specs side by side·14 genres scored·UK prices from Wex Photo Video and Clifton Cameras
How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.
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Verdictwhich should you buy?
A9 — Professional Sports, Wildlife & Action Photography: The camera that changed professional photography — the A9's 20fps blackout-free burst and silent shutter proved mirrorless had definitively surpassed the DSLR.
Who should buy what
A9 (2017)
is the right camera for you if…
- Sports photographers who want the original 20fps mirrorless at a lower used price than the A9 II
- Wildlife photographers who need blackout-free burst with fast, reliable tracking
- Sony FE system users who want a professional sports body
- Photographers interested in the camera that changed the industry
Full specificationsthe better value in each row is highlighted
| Specification | A9Sony · 2017 | RX100Sony · 2012 |
|---|---|---|
| Price | £1,026 used | £74 usedBest |
| Sensor | 24.2MP Full-Frame Stacked BSI CMOS Exmor RS | 20.2MP 1-inch CMOS |
| Resolution | 24.2MPBest | 20.2MP |
| Video | 4K/30p, 1080p/120p | Full HD 1080p/60 |
| Autofocus | 693 phase-detect + 25 contrast-detect, real-time eye/body tracking | 25-point contrast-detect AF with face detection |
| Stabilisation | IBIS — 5-axis, up to 5 stops | Optical SteadyShot (in the lens), no IBIS |
| Burst Rate | 20fps (blackout-free, silent electronic shutter with full AF/AE)Best | 10fps (focus fixed at the first frame) |
| Battery Life | ~650 shots (CIPA)Best | ~330 shots (CIPA) |
| Weight | 673g (with battery and card) | 240g (with battery and card)Best |
| Dimensions | 126.9 × 95.6 × 63.0mm | 101.6 × 58.1 × 35.9mm |
| Weather Sealed | YesBest | Not weather sealed |
| Viewfinder | EVF, OLED 3.69M dots, 0.78× magnification, 60fps refresh (blackout-free) | No viewfinder |
| Screen | 3.0" tilting touchscreen | 3.0" fixed LCD, 1.23M dots |
| Mount | Sony FE (full-frame E-mount) | Fixed Zeiss Vario-Sonnar T* 28-100mm f/1.8-4.9 |
| Memory Cards | Dual SD UHS-II slots | Single SD / Memory Stick slot |
| Connectivity | USB, Wi-Fi 5GHz, Bluetooth, HDMI | Micro USB, micro HDMI, Eye-Fi |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
How they score by genreengine base scores out of 10
Genre
A9
RX100
Portrait
7.5/10
3.3/10
Street
6.0/10
6.3/10
Travel
5.9/10
6.0/10
Wedding & Events
7.5/10
2.2/10
Filmmaking
6.7/10
—
Documentary
6.8/10
3.3/10
Sports & Action
8.2/10
—
Landscape
6.1/10
3.9/10
Wildlife
8.2/10
—
Casual
4.6/10
4.0/10
Food
6.5/10
3.6/10
Macro
5.8/10
2.9/10
Architecture
6.0/10
3.6/10
Astrophotography
7.3/10
2.6/10
Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →
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