Upgrade Guide

Sony A7 IV→Sony A7S III

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

You own

Sony

A7 IV

£2299

2021

→

Upgrade to

Sony

A7S III

£2999 (+£700)

2020

⚖️

Situational

One clear hardware improvement over the A7 IV. Worth it if that specific upgrade aligns with what you shoot.

What's new in the A7S III

Unchanged or similar

Suitability by genre

Full spec comparison

Spec	A7 IV	A7S III
Price	£2,299	£2,999
Released	2021	2020	↓
Sensor	33MP Full-frame BSI Exmor R CMOS	12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated)
Resolution	33MP	12MP	↓
Video	4K/60p oversampled, 10-bit internal, S-Log3, S-Cinetone	4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p
Autofocus	759-point phase-detect, AI subject recognition	Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition
Stabilisation	5-axis IBIS, 5.5 stops	5.5-stop IBIS
Burst Rate	10fps mechanical, 30fps electronic	10fps mechanical
Battery Life	~580 shots (CIPA)	~600 shots (CIPA) / ~70min continuous 4K recording	↑
Weight	659g body only	699g (body, battery, card)	↓
Weather Sealed	Yes	Yes
Viewfinder	EVF, 3.69M dots, 0.78× magnification	OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made
Screen	3.0" vari-angle touchscreen	3.0" vari-angle touchscreen, 1.44M dots
Mount	Sony FE (full-frame E-mount)	Sony E-mount
Memory Cards	Dual slots: CFexpress Type A + SD UHS-II	Dual CFexpress Type A / SD UHS-II (both slots)

Compare side-by-side

See A7 IV 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 A7 IV

Related buying guides

Camera family history