Decision tools · Compare
A7 IV vs FX3
Quick take: The A7 IV has the highest resolution at 33MP; the A7 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?
A7 IV — Portrait & Wedding Photography: The full-frame portrait benchmark — 33MP, AI Eye AF, and exceptional skin-tone rendering in a pro-grade hybrid body.
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
A7 IV (2021)
is the right camera for you if…
- Working photographers who want a reliable full-frame all-rounder
- Portrait, wedding, and event photographers needing 33MP and fast AF
- A7 III owners ready for a major upgrade in resolution, AF, and video
- Hybrid shooters who want 4K/60p and 33MP stills in one dependable body
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 | A7 IVSony · 2021 | FX3Sony · 2021 |
|---|---|---|
| Price | £1,799Best | £2,999 |
| Sensor | 33MP Full-frame BSI Exmor R CMOS | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) |
| Resolution | 33.0MPBest | 12.1MP |
| Video | 4K/60p oversampled, 10-bit internal, S-Log3, S-Cinetone | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone |
| Autofocus | 759-point phase-detect, AI subject recognition | Real-time tracking with subject recognition (human, animal) |
| Stabilisation | 5-axis IBIS, 5.5 stops | 5-axis IBIS — 5 stops |
| Burst Rate | 10fps mechanical, 30fps electronic | 10fps mechanical, 10fps electronic |
| Battery Life | ~580 shots (CIPA) | ~640 shots (CIPA)Best |
| Weight | 659g (body only)Best | 715g (body only) |
| Dimensions | 131.3 × 96.4 × 79.8mm | 129.7 × 78.0 × 84.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 3.69M dots, 0.78× magnification | None — monitor/external EVF use only |
| Screen | 3.0" vari-angle touchscreen | 3.0" touchscreen, fully articulating |
| Mount | Sony FE (full-frame E-mount) | Sony FE mount (full-frame E-mount) |
| Memory Cards | Slot 1 CFexpress Type A / SD UHS-II, slot 2 SD UHS-II | Dual CFexpress Type A / SD UHS-II slots |
| Connectivity | USB-C (3.2 Gen 2), Bluetooth, Wi-Fi | 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
A7 IV
FX3
Portrait
8.2/10
5.7/10
Street
6.5/10
4.3/10
Travel
6.3/10
5.5/10
Wedding & Events
7.9/10
6.0/10
Vlogging & Video
6.1/10
6.1/10
Filmmaking
7.2/10
9.1/10
Documentary
7.4/10
8.0/10
Sports & Action
7.5/10
5.5/10
Landscape
6.7/10
4.7/10
Wildlife
7.8/10
5.8/10
Casual
5.3/10
4.9/10
Food
7.6/10
6.7/10
Macro
7.3/10
5.5/10
Architecture
6.8/10
5.2/10
Astrophotography
7.3/10
6.7/10
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 →
Next
More comparisons with A7 IV
Camera family history