Upgrade Guide

Sony A7 III→Sony A7S III

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

You own

Sony

A7 III

£1699

2018

→

Upgrade to

Sony

A7S III

£2999 (+£1,300)

2020

✅

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 A7S III

Unchanged or similar

Suitability by genre

Full spec comparison

Spec	A7 III	A7S III
Price	£1,699	£2,999
Released	2018	2020	↑
Sensor	24.2MP Full-Frame Exmor R BSI CMOS	12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated)
Resolution	24MP	12MP	↓
Video	4K/30p (6K oversampled), 1080p/120p slow-motion	4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p
Autofocus	Phase-detect, 693 points, real-time Eye AF & animal AF	Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition
Stabilisation	5-axis IBIS, 5 stops	5.5-stop IBIS
Burst Rate	10fps with AF/AE tracking	10fps mechanical
Battery Life	~710 shots (CIPA)	~600 shots (CIPA) / ~70min continuous 4K recording	↓
Weight	565g (body, battery, card)	699g (body, battery, card)	↓
Weather Sealed	Yes	Yes
Viewfinder	EVF, 2.36M dots, 0.78× magnification	OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made
Screen	3.0" tilting touchscreen, 921k dots	3.0" vari-angle touchscreen, 1.44M dots
Mount	Sony E-mount	Sony E-mount
Memory Cards	Dual SD (UHS-II slot 1, UHS-I slot 2)	Dual CFexpress Type A / SD UHS-II (both slots)

Compare side-by-side

See A7 III and A7S III next to each other with our interactive comparison tool.

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