Decision tools · Compare
Quick take: The A1 II has the highest resolution at 50MP; the A9 is the most affordable.
16 specs side by side·15 genres scored·UK prices from Wex Photo Video and Clifton Cameras
Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more
A1 II — Professional Sports, Wildlife & High-Resolution Studio Work: The most complete camera ever made — 50MP, 30fps, 8K, and the world's best EVF in a single flagship body.
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.
| Specification | A1 IISony · 2024 | A9Sony · 2017 |
|---|---|---|
| Price | £5,699 | £1,026 usedBest |
| Sensor | 50.1MP full-frame stacked BSI CMOS | 24.2MP Full-Frame Stacked BSI CMOS Exmor RS |
| Resolution | 50.1MPBest | 24.2MP |
| Video | 8K/30p, 4K/120p 10-bit, S-Log3 | 4K/30p, 1080p/120p |
| Autofocus | AI subject recognition — human, animal, bird, insect, vehicle, aircraft, train | 693 phase-detect + 25 contrast-detect, real-time eye/body tracking |
| Stabilisation | 8.5-stop IBIS (with in-lens OSS) | IBIS — 5-axis, up to 5 stops |
| Burst Rate | 30fps electronic (with full AF/AE), 10fps mechanicalBest | 20fps (blackout-free, silent electronic shutter with full AF/AE) |
| Battery Life | ~530 shots (CIPA) | ~650 shots (CIPA)Best |
| Weight | 743g (body only) | 673g (with battery and card)Best |
| Dimensions | 136.1 × 96.9 × 82.9mm | 126.9 × 95.6 × 63.0mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.9× 9.44M-dot — the highest resolution EVF available | EVF, OLED 3.69M dots, 0.78× magnification, 60fps refresh (blackout-free) |
| Screen | 3.2" fully articulating touchscreen, 2.1M dots | 3.0" tilting touchscreen |
| Mount | Sony E-mount (full-frame) | Sony FE (full-frame E-mount) |
| Memory Cards | Dual CFexpress Type A / SD UHS-II slots | Dual SD UHS-II slots |
| Connectivity | USB-C 3.2 Gen 2, Wi-Fi 6GHz, Bluetooth 5.3, HDMI full-size | USB, Wi-Fi 5GHz, Bluetooth, HDMI |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
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 →