Sony a7 IV vs Sony a9 III
The bottom line
Same line, different generation: the Sony a9 III (2024) moves ahead on burst speed (120fps vs 10fps), 4K frame rate (120p vs 60p) and subject-detection AF. The Sony a7 IV is still the value pick at $2,499 ($5,999 for the Sony a9 III). If those newer features aren't ones you'll actually use, the Sony a7 IV gives you most of the experience for less.
Choose the Sony a7 IV if…
- ✓You want maximum detail for landscapes, studio or large prints — 33MP resolves noticeably more than 24.6MP and gives more cropping latitude.
- ✓You're budget-conscious — it launched at $2,499, about $3,500 less, freeing money for lenses.
- ✓You vlog or shoot handheld solo — the fully-articulating screen flips to face you and there's a mic input for clean audio.
- ✓You shoot in low light or indoors — a higher native ISO ceiling (51,200) gives it the edge after dark.
Choose the Sony a9 III if…
- ✓You shoot action, sports or wildlife — 120fps burst plus dedicated subject-tracking AF keeps up with fast, erratic movement where 10fps would drop frames.
- ✓You shoot video seriously — it brings smoother 120p 4K vs 60p.
- ✓You shoot in low light or indoors — AF that focuses down to -5 EV gives it the edge after dark.
- ✓You need backup-while-you-shoot reliability — dual card slots (the other has one) matter for paid work like weddings and events.
Where they differ
- ›Burst: the Sony a9 III shoots 120fps to the Sony a7 IV's 10fps — the gap that decides whether you nail the peak moment in sports and wildlife.
- ›Price: the Sony a7 IV launched at $2,499, $3,500 under the Sony a9 III — money that could go toward glass.
- ›Card slots: the Sony a9 III has dual slots for instant backup — the reliability paid work depends on.
- ›Resolution: 33MP on the Sony a7 IV vs 24.6MP — more detail and crop room, at the cost of larger files.
Frequently asked
Is the Sony a7 IV or the Sony a9 III better?
Same line, different generation: the Sony a9 III (2024) moves ahead on burst speed (120fps vs 10fps), 4K frame rate (120p vs 60p) and subject-detection AF. The Sony a7 IV is still the value pick at $2,499 ($5,999 for the Sony a9 III). If those newer features aren't ones you'll actually use, the Sony a7 IV gives you most of the experience for less.
Who should choose the Sony a7 IV?
Choose the Sony a7 IV if you want maximum detail for landscapes, studio or large prints — 33MP resolves noticeably more than 24.6MP and gives more cropping latitude. Choose it if you're budget-conscious — it launched at $2,499, about $3,500 less, freeing money for lenses. Choose it if you vlog or shoot handheld solo — the fully-articulating screen flips to face you and there's a mic input for clean audio. Choose it if you shoot in low light or indoors — a higher native ISO ceiling (51,200) gives it the edge after dark.
Who should choose the Sony a9 III?
Choose the Sony a9 III if you shoot action, sports or wildlife — 120fps burst plus dedicated subject-tracking AF keeps up with fast, erratic movement where 10fps would drop frames. Choose it if you shoot video seriously — it brings smoother 120p 4K vs 60p. Choose it if you shoot in low light or indoors — AF that focuses down to -5 EV gives it the edge after dark. Choose it if you need backup-while-you-shoot reliability — dual card slots (the other has one) matter for paid work like weddings and events.
What is the main difference between the Sony a7 IV and the Sony a9 III?
Burst: the Sony a9 III shoots 120fps to the Sony a7 IV's 10fps — the gap that decides whether you nail the peak moment in sports and wildlife.
| Product | ||
|---|---|---|
| Imaging | ||
| Sensor Type | BSI CMOS | Global Shutter CMOS |
| Sensor Size | Full-Frame | Full-Frame |
| Image Processor | BIONZ XR | BIONZ XR |
| Effective Resolution | 33 MP | 24.6 MP |
| Lens Mount | Sony E | Sony E |
| Exposure Control | ||
| ISO Range (Native) | 100 – 51200 | 250 – 25600 |
| ISO Range (Extended) | 50 – 204800 | 125 – 51200 |
| Mechanical Shutter | 1/8000 | − |
| Electronic Shutter | 1/8000 | 1/80000 |
| Flash Sync Speed | 1/250 | 1/80000 |
| Built-in Flash | No | No |
| Still Image Capture | ||
| Continuous Shooting | 10 fps | 120 fps |
| Video Capture | ||
| Max Resolution | 4K | 4K |
| 8K Recording | − | − |
| 4K Recording | Up to 60p | Up to 120p |
| 1080p Recording | Up to 120p | Up to 240p |
| 10-bit Internal | Yes | Yes |
| Recording Limit | No limit | No limit |
| Log Profiles | S-Log3 / HLG / S-Cinetone | S-Log3 / HLG / S-Cinetone |
| Built-in Mic | Stereo | Stereo |
| Headphone Jack | Yes | Yes |
| Mic Input | Yes | Yes |
| HDMI Output | Full-size (Type A) | Full-size (Type A) |
| Focus | ||
| Phase Detect Points | 759 | 759 |
| Contrast Detect Points | 425 | 425 |
| Low Light AF | -4 EV | -5 EV |
| Eye AF | Yes | Yes |
| Animal AF | Yes | Yes |
| Vehicle AF | No | Yes |
| Viewfinder | ||
| EVF Type | OLED | OLED |
| EVF Resolution | 3.69M dots | 9.44M dots |
| EVF Magnification | 0.78x | 0.9x |
| Monitor | ||
| LCD Size | 3" | 3.2" |
| LCD Resolution | 1.04M dots | 2.10M dots |
| LCD Type | Vari-Angle | 4-Axis Tilting |
| Touch Screen | Yes | Yes |
| Interface | ||
| Wi-Fi | Wi-Fi 5 | Wi-Fi 6 |
| Bluetooth | v4.2 | v5.3 |
| USB | USB-C 3.2 Gen 2 | USB-C 3.2 Gen 2 |
| Memory Card Slots | 1x CFexpress Type A / SD UHS-II + 1x SD UHS-II | 2x CFexpress Type A / SD UHS-II |
| GPS | No | No |
| General | ||
| Price (MSRP) | $2,499 | $5,999 |
| Body Material | Magnesium Alloy | Magnesium Alloy |
| Dimensions | 131.3×96.4×79.8 mm | 136.1×96.9×82.9 mm |
| Weight | 658g (1.45 lb) | 703g (1.55 lb) |
| Weather Sealed | Yes | Yes |
| In-Body Stabilization | Yes | Yes |
| Battery Life (EVF) | 520 shots | 520 shots |
| Battery Life (LCD) | 580 shots | 530 shots |
| Battery Type | NP-FZ100 | NP-FZ100 |
