Sony A7 IV vs Sony FX3
The Sony A7 IV is a versatile full-frame mirrorless camera excelling at photography and hybrid work, while the Sony FX3 is a compact cinema camera optimized for video production with professional features and form factor.
Sony A7 IV
A full-frame mirrorless camera designed for photography-first users who need strong video capabilities. Features a 61MP sensor, advanced autofocus, and comprehensive controls suited to hybrid creation.
Sensor
Full-frame, 61MP
Video Max
4K 60fps (8-bit) / 4K 30fps (10-bit)
Autofocus
759 phase-detect points
Price
~$2,500 USD (body)
Release
November 2021
Pros
- 61MP sensor delivers exceptional stills resolution
- Excellent autofocus with 759 contrast-detection points
- More affordable entry point for full-frame systems
Cons
- Smaller, more compact body limits ergonomic control layout for video work
- 4K video limited to 60fps (30fps at 10-bit)
- Not built as a dedicated cinema tool
Sony FX3
A compact, purpose-built cinema camera featuring a 35mm full-frame sensor and cinema-focused ergonomics. Designed for professional video production with broadcast-quality codecs and integrated XLR audio.
Sensor
Full-frame, 12MP
Video Max
4K 120fps / 8K (external recorder)
Audio
XLR inputs (3-pin), timecode
Price
~$3,900 USD (body)
Release
June 2021
Pros
- Cinema-grade design with XLR audio inputs and timecode support
- 8K capable (requires external recorder via HDMI)
- Robust video codecs including XAVC-S and ProRes RAW support
Cons
- Lower still-image resolution (12MP) unsuitable for photography-heavy workflows
- Significantly higher price point than A7 IV
- Smaller sensor than A7 IV limits low-light still performance
Sony FX3 wins
FX3 is the superior choice overall due to its cinema-first design, professional video codecs, XLR audio, and broadcast-grade frame rates—offsetting its lower still resolution.
Sony A7 IV
Best for hybrid photographers who shoot stills as primary work and need reliable video capability for secondary content.
Sony FX3
Best for professional video producers, cinematographers, and broadcast productions requiring cinema-grade features and high frame rates.
Camera Type & Ergonomics Comparison
| Aspect | Sony A7 IV | Sony FX3 |
|---|---|---|
| Primary Design Intent | Hybrid photography & video | Cinema-first video production |
| Body Style | Compact, DSLR-like form factor | Compact cinema camera with XLR inputs |
| Audio Connectivity | 3.5mm microphone input only | Professional 3-pin XLR inputs |
| Timecode Support | Not supported | Built-in timecode/sync capabilities |
| Handle & Rig Compatibility | Limited cinema accessories | Cinema rig and accessory friendly |
Sensor & Image Performance
Still-Image Resolution
A7 IV's 61MP sensor vastly outperforms FX3's 12MP for photography-focused work.
Video Frame Rate Capability
FX3 reaches 4K 120fps and 8K (external), while A7 IV maxes at 4K 60fps.
Low-Light Sensitivity
A7 IV's higher MP count and native sensitivity provide slight low-light edge despite both using full-frame sensors.
Video Codec Flexibility
FX3 supports professional XAVC-S, ProRes RAW, and external 8K; A7 IV limited to standard UHD codecs.
Color Science & Grading
FX3 offers more robust cinema color profiles and LUT support; A7 IV adequate but less cinema-native.
Autofocus & Workflow Differences
The A7 IV features 759 phase-detect autofocus points optimized for photo work, while FX3 offers continuous video autofocus tuned for cinema workflows with adjustable speeds and zones. For hybrid creators mixing stills and video, A7 IV's AF excels at photography; for dedicated video teams, FX3's cinema-optimized AF tracking is more predictable. The FX3 integrates timecode and professional metadata workflows native to cinema pipelines, while A7 IV suits freelancers and content creators needing flexibility.
When to choose each
Choose Sony A7 IV if…
Best for hybrid photographers who shoot stills as primary work and need reliable video capability for secondary content.
Choose Sony FX3 if…
Best for professional video producers, cinematographers, and broadcast productions requiring cinema-grade features and high frame rates.
Frequently Asked Questions
The FX3 is built for video with XLR audio, timecode, 4K 120fps, and professional codecs; the A7 IV is better for hybrid creators who prioritize stills. For dedicated video work, FX3 is the superior choice.
The A7 IV can produce quality video but lacks cinema-specific features like XLR audio, timecode sync, and high frame rate support needed for broadcast and professional workflows. It's better suited to content creation and hybrid roles.
The A7 IV body costs approximately $2,500 USD, while the FX3 typically retails around $3,900 USD. The FX3's premium reflects its cinema-focused design and professional feature set.
Sources & references
Suggested sources to verify product details, pricing, reviews, and specifications.
- OfficialSony A7 IV Official Specifications
Official specs on sensor, autofocus, and video capabilities
- OfficialSony FX3 Official Specifications
Official details on video frame rates, audio, and cinema features
- ReviewSony FX3 Cinema Camera Review
Professional comparison of cinema-grade features and video performance