Upgrade Guide

Sony A6600→Sony A7S III

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

You own

Sony

A6600

£1299

2019

→

Upgrade to

Sony

A7S III

£2999 (+£1,700)

2020

✅

Worthwhile

Clear improvements over the A6600. 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	A6600	A7S III
Price	£1,299	£2,999
Released	2019	2020	↑
Sensor	24.2MP APS-C Exmor CMOS	12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated)
Resolution	24MP	12MP	↓
Video	4K/30p (no crop), 1080p/120p	4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p
Autofocus	Real-time Eye AF, real-time tracking — inherited from A9	Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition
Stabilisation	5-axis IBIS — 5 stops	5.5-stop IBIS
Burst Rate	11fps continuous with AF/AE	10fps mechanical	↓
Battery Life	~810 shots (CIPA) — large NP-FZ100 battery	~600 shots (CIPA) / ~70min continuous 4K recording	↓
Weight	503g body only	699g (body, battery, card)	↓
Weather Sealed	Yes	Yes
Viewfinder	EVF, 2.36M dots, 0.70× magnification	OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made
Screen	3.0" touchscreen, tilting	3.0" vari-angle touchscreen, 1.44M dots
Mount	Sony E-mount (APS-C)	Sony E-mount
Memory Cards	Single SD UHS-I slot	Dual CFexpress Type A / SD UHS-II (both slots)

Compare side-by-side

See A6600 and A7S III next to each other with our interactive comparison tool.

Get a personalised upgrade score

Tell us what you shoot and we'll score the A7S III against your specific genres — not just specs.

Other upgrades from the A6600

Related buying guides

Camera family history