GFX 100vs A7S III
Fujifilm
GFX 100 (2019)
Starting from £4999 new
Best for Commercial, studio & landscape photography
View GFX 100
Sony
A7S III (2020)
Starting from £2999 new
Best for Professional video & low-light filmmaking
View A7S III
GearScore™ Verdict — Which should you buy?
Commercial, Studio & Landscape Photography — GFX 100 (2019): The world's first 100MP mirrorless with IBIS and phase-detect AF — the GFX 100 was a landmark in medium format, but its size and weight are professional-grade.
Professional Video & Low-Light Filmmaking — A7S III (2020): If video is your primary discipline, the A7S III is the camera. 4K/120p at 10-bit in a weather-sealed body with a 9.44M dot EVF is an extraordinary package. The 12MP sensor isn't limiting for video — and it's usable at ISO 409,600 in a pinch.
Who should buy what
GFX 100 (2019)
- Commercial and advertising photographers who need extraordinary resolution
- Landscape photographers willing to carry a large body for maximum detail
- GFX system users who want the original 100MP body at a lower cost than GFX 100S
- Studio photographers who want the finest image quality the GFX system can offer
A7S III (2020)
- Filmmakers and videographers who need 4K/120p at 10-bit
- Event videographers who shoot in dark venues regularly
- Documentary filmmakers who need reliable AF and weather sealing
- Hybrid shooters where video is primary and stills are secondary
Quick take: The gfx 100 has the highest resolution at 102mp; the a7s iii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | GFX 100 (2019) | A7S III (2020) |
|---|---|---|
| Price | £4,999 | £2,999 |
| Sensor | 102MP Medium Format BSI CMOS (43.8 × 32.9mm) | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 102.0MP | 12.1MP |
| Video | 4K/30p, FHD/120p; F-Log support | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | Phase-detect hybrid AF (first GFX with phase-detect), face/eye detection | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition |
| Stabilisation | IBIS — up to 5.5 stops | 5.5-stop IBIS |
| Burst Rate | 5fps | 10fps mechanical |
| Battery Life | ~800 shots (CIPA, dual NP-T125 batteries in integrated grip) | ~600 shots (CIPA) / ~70min continuous 4K recording |
| Weight | 1,400g (with battery and card) | 699g (body, battery, card) |
| Dimensions | 156.2 × 163.6 × 102.9mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 5.76M dots, 0.77× magnification | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made |
| Screen | 3.2" fully articulating touchscreen | 3.0" vari-angle touchscreen, 1.44M dots |
| Mount | Fujifilm GFX (G-mount) | Sony E-mount |
| Memory Cards | Dual SD UHS-II slots | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB-C, Wi-Fi, Bluetooth, 3.5mm mic, headphone jack, HDMI | USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth |
Suitability by genre
| Genre | GFX 100 | A7S III |
|---|---|---|
| Portrait | ||
| Landscape | — | |
| Architecture | — | |
| Travel | ||
| Sports & Action | — | |
| Vlogging & Video | — | |
| Video | — | |
| Wildlife | — | |
| Street | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with GFX 100
Camera family history