Sony a7 III vs Sony a7C
The bottom line
These two are closely matched. The differences below are where they diverge — weigh the ones that map to how you actually shoot, and let price and handling break the tie.
Choose the Sony a7 III if…
- ✓You need backup-while-you-shoot reliability — dual card slots (the other has one) matter for paid work like weddings and events.
- ✓You work outdoors — it's weather-sealed for rain and dust, the other isn't.
Choose the Sony a7C if…
- ✓You shoot in low light or indoors — AF that focuses down to -4 EV gives it the edge after dark.
- ✓You value portability — at 509g (1.12 lb) it's noticeably lighter than the 650g (1.43 lb) alternative for travel and all-day carry.
Where they differ
- ›Price: the Sony a7C launched at $1,799, $200 under the Sony a7 III — money that could go toward glass.
- ›Card slots: the Sony a7 III has dual slots for instant backup — the reliability paid work depends on.
- ›Durability: the Sony a7 III is weather-sealed against dust and rain; the other isn't.
- ›Weight: the Sony a7C is 509g (1.12 lb) vs 650g (1.43 lb) — 141g you'll feel on a long day out.
Frequently asked
Is the Sony a7 III or the Sony a7C better?
These two are closely matched. The differences below are where they diverge — weigh the ones that map to how you actually shoot, and let price and handling break the tie.
Who should choose the Sony a7 III?
Choose the Sony a7 III if you need backup-while-you-shoot reliability — dual card slots (the other has one) matter for paid work like weddings and events. Choose it if you work outdoors — it's weather-sealed for rain and dust, the other isn't.
Who should choose the Sony a7C?
Choose the Sony a7C if you shoot in low light or indoors — AF that focuses down to -4 EV gives it the edge after dark. Choose it if you value portability — at 509g (1.12 lb) it's noticeably lighter than the 650g (1.43 lb) alternative for travel and all-day carry.
What is the main difference between the Sony a7 III and the Sony a7C?
Price: the Sony a7C launched at $1,799, $200 under the Sony a7 III — money that could go toward glass.
| Product | ||
|---|---|---|
| Imaging | ||
| Sensor Type | BSI CMOS | BSI CMOS |
| Sensor Size | Full-Frame | Full-Frame |
| Image Processor | BIONZ X | BIONZ X |
| Effective Resolution | 24.2 MP | 24.2 MP |
| Lens Mount | Sony E | Sony E |
| Exposure Control | ||
| ISO Range (Native) | 100 – 51200 | 100 – 51200 |
| ISO Range (Extended) | 50 – 204800 | 50 – 204800 |
| Mechanical Shutter | 1/8000 | 1/8000 |
| Electronic Shutter | 1/8000 | 1/8000 |
| Flash Sync Speed | 1/250 | 1/160 |
| Built-in Flash | No | No |
| Still Image Capture | ||
| Continuous Shooting | 10 fps | 10 fps |
| Video Capture | ||
| Max Resolution | 4K | 4K |
| 8K Recording | − | − |
| 4K Recording | Up to 30p | Up to 30p |
| 1080p Recording | Up to 120p | Up to 60p |
| 10-bit Internal | Yes | Yes |
| Recording Limit | 29 min | 29 min |
| Log Profiles | S-Log3 / HLG / S-Cinetone | S-Log3 / HLG / S-Cinetone |
| Built-in Mic | Stereo | Mono |
| Headphone Jack | Yes | Yes |
| Mic Input | Yes | Yes |
| HDMI Output | Micro (Type D) | Micro (Type D) |
| Focus | ||
| Phase Detect Points | 693 | 693 |
| Contrast Detect Points | 425 | − |
| Low Light AF | -3 EV | -4 EV |
| Eye AF | Yes | Yes |
| Animal AF | Yes | Yes |
| Vehicle AF | No | No |
| Viewfinder | ||
| EVF Type | OLED | OLED |
| EVF Resolution | 2.36M dots | 2.36M dots |
| EVF Magnification | 0.78x | 0.59x |
| Monitor | ||
| LCD Size | 3" | 3" |
| LCD Resolution | 0.92M dots | 1.04M dots |
| LCD Type | Tilting | Tilting |
| Touch Screen | Yes | Yes |
| Interface | ||
| Wi-Fi | Wi-Fi 5 | Wi-Fi 5 |
| Bluetooth | v4.2 | v4.2 |
| USB | USB-C 3.1 Gen 1 | USB-C 3.2 |
| Memory Card Slots | 2x SD (1x UHS-II) | 1x SD UHS-II |
| GPS | No | No |
| General | ||
| Price (MSRP) | $1,999 | $1,799 |
| Body Material | Magnesium Alloy | Magnesium Alloy |
| Dimensions | 126.9×95.6×73.7 mm | 130.4×70.8×75.8 mm |
| Weight | 650g (1.43 lb) | 509g (1.12 lb) |
| Weather Sealed | Yes | No |
| In-Body Stabilization | Yes | Yes |
| Battery Life (EVF) | 610 shots | 740 shots |
| Battery Life (LCD) | 710 shots | 740 shots |
| Battery Type | NP-FZ100 | NP-FZ100 |
