Upgrade Guide

Sony A7 III→Sony Sony A9 III

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

You own

Sony

A7 III

£1699

2018

→

Upgrade to

Sony

Sony A9 III

£5999 (+£4,300)

2023

✅

Worthwhile

Clear improvements over the A7 III. Whether it justifies the cost depends on which upgrades matter most to your shooting.

What's new in the Sony A9 III

Unchanged or similar

Suitability by genre

Full spec comparison

Spec	A7 III	Sony A9 III
Price	£1,699	£5,999
Released	2018	2023	↑
Sensor	24.2MP Full-Frame Exmor R BSI CMOS	24.6MP full-frame Exmor RS CMOS (global shutter)
Resolution	24MP	25MP	↑
Video	4K/30p (6K oversampled), 1080p/120p slow-motion	4K/120p, 4K/60p, 1080p/240p
Autofocus	Phase-detect, 693 points, real-time Eye AF & animal AF	AI subject recognition AF, 759-point phase-detect
Stabilisation	5-axis IBIS, 5 stops	8-stop IBIS
Burst Rate	10fps with AF/AE tracking	120fps blackout-free electronic	↑
Battery Life	~710 shots (CIPA)	530 shots (CIPA)	↓
Weight	565g (body, battery, card)	703g body only	↓
Weather Sealed	Yes	Yes
Viewfinder	EVF, 2.36M dots, 0.78× magnification	0.64" Quad-XGA OLED EVF, 9.44M dots
Screen	3.0" tilting touchscreen, 921k dots	3.2" fully articulating touchscreen
Mount	Sony E-mount	Sony FE (E-mount)
Memory Cards	Dual SD (UHS-II slot 1, UHS-I slot 2)	Dual CFexpress Type A / SD UHS-II

Compare side-by-side

See A7 III and Sony A9 III next to each other with our interactive comparison tool.

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Other upgrades from the A7 III

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Camera family history