Upgrade Guide

Sony A6400→Sony A7 III

Is it worth upgrading? Spec analysis, key improvements, and our verdict.

You own

Sony

A6400

£899

2019

→

Upgrade to

Sony

A7 III

£1699 (+£800)

2018

✅

Worthwhile

Clear improvements over the A6400. Whether it justifies the cost depends on which upgrades matter most to your shooting.

What's new in the A7 III

Unchanged or similar

Suitability by genre

Full spec comparison

Spec	A6400	A7 III
Price	£899	£1,699
Released	2019	2018	↓
Sensor	24.2MP APS-C Exmor CMOS BSI	24.2MP Full-Frame Exmor R BSI CMOS
Resolution	24MP	24MP
Video	4K/30p (6K oversampled, no crop), 1080p/120p slow-motion	4K/30p (6K oversampled), 1080p/120p slow-motion
Autofocus	Phase-detect, 425 points, real-time Eye AF & animal AF	Phase-detect, 693 points, real-time Eye AF & animal AF
Stabilisation	None (no IBIS)	5-axis IBIS, 5 stops
Burst Rate	11fps mechanical, 8fps with AF tracking	10fps with AF/AE tracking	↓
Battery Life	~410 shots (CIPA)	~710 shots (CIPA)	↑
Weight	403g (body, battery, card)	565g (body, battery, card)	↓
Weather Sealed	No	Yes	↑
Viewfinder	EVF, 2.36M dots, 0.70× magnification	EVF, 2.36M dots, 0.78× magnification
Screen	3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots	3.0" tilting touchscreen, 921k dots
Mount	Sony E-mount	Sony E-mount
Memory Cards	Single SD UHS-I	Dual SD (UHS-II slot 1, UHS-I slot 2)

Compare side-by-side

See A6400 and A7 III next to each other with our interactive comparison tool.

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Other upgrades from the A6400

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Camera family history