Sony
A7R IV 2019
Best for Landscape, studio, commercial
£2199
list price · used from £1079 at Wex Photo Video
Decision tools · Compare
A7R IV vs FX3
Quick take: The A7R IV has the highest resolution at 61MP; the A7R IV is the most affordable.
16 specs side by side·15 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.
Sony
FX3 2021
Best for Professional video, documentary & cinematic filmmaking
£2999
new today at Wex Photo Video
Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more
Verdictwhich should you buy?
A7R IV — Landscape, Studio, Commercial: 61MP in a mirrorless body — the resolution benchmark.
FX3 — Professional Video, Documentary & Cinematic Filmmaking: The definitive run-and-gun cinema camera — A7S III sensor quality in a body built specifically for video professionals.
Who should buy what
A7R IV (2019)
is the right camera for you if…
- Landscape photographers who print large
- Studio shooters needing maximum detail
FX3 (2021)
is the right camera for you if…
- Professional videographers and filmmakers who need cinema-quality colour science in a compact body
- Documentary and run-and-gun shooters who need 4K/120p and built-in XLR audio
- Sony A7S III owners who want a purpose-built video body alongside their stills camera
- Gimbal and drone operators who need a compact full-frame cinema camera
Full specificationsthe better value in each row is highlighted
| Specification | A7R IVSony · 2019 | FX3Sony · 2021 |
|---|---|---|
| Price | £2,199Best | £2,999 |
| Sensor | Full-frame BSI Exmor R CMOS 35mm | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) |
| Resolution | 61.0MPBest | 12.1MP |
| Video | 4K 30fps | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone |
| Autofocus | 567-point phase-detect, real-time tracking | Real-time tracking with subject recognition (human, animal) |
| Stabilisation | 5-axis IBIS, 5.5 stops | 5-axis IBIS — 5 stops |
| Burst Rate | 10fps | 10fps mechanical, 10fps electronic |
| Battery Life | 670 shots (CIPA)Best | ~640 shots (CIPA) |
| Weight | 665g (body only)Best | 715g (body only) |
| Dimensions | 128.9 × 96.4 × 77.5mm | 129.7 × 78.0 × 84.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.78× 5.76M-dot | None — monitor/external EVF use only |
| Screen | 3.0" tilting touchscreen, 1.44M-dot | 3.0" touchscreen, fully articulating |
| Mount | Sony E-Mount | Sony FE mount (full-frame E-mount) |
| Memory Cards | Dual SD UHS-II slots | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | Wi-Fi 5GHz, Bluetooth 4.1, USB-C 3.2 | USB-C (10Gbps), full-size HDMI, XLR via handle, Bluetooth, Wi-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
A7R IV
FX3
Portrait
8.1/10
5.7/10
Street
6.2/10
4.3/10
Travel
6.2/10
5.5/10
Wedding & Events
7.8/10
6.0/10
Filmmaking
6.4/10
9.1/10
Documentary
6.9/10
8.0/10
Sports & Action
7.4/10
5.5/10
Landscape
7.9/10
4.7/10
Wildlife
7.7/10
5.8/10
Casual
4.8/10
4.9/10
Food
7.4/10
6.7/10
Macro
6.5/10
5.5/10
Architecture
8.1/10
5.2/10
Astrophotography
6.9/10
6.7/10
Vlogging & Video
—
6.1/10
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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