Upgrade Guide

Sony A7S III→Sony A1

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

You own

Sony

A7S III

£2999

2020

→

Upgrade to

Sony

£5999 (+£3,000)

2021

✅

Worthwhile

Clear improvements over the A7S III. Whether it justifies the cost depends on which upgrades matter most to your shooting.

What's new in the A1

Suitability by genre

Full spec comparison

Spec	A7S III	A1
Price	£2,999	£5,999
Released	2020	2021	↑
Sensor	12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated)	50.1MP Full-Frame Stacked BSI CMOS Exmor RS
Resolution	12MP	50MP	↑
Video	4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p	8K/30p, 4K/120p, 1080p/240p
Autofocus	Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition	Real-time Tracking, AI subject recognition — 759 phase-detect points
Stabilisation	5.5-stop IBIS	IBIS — up to 5.5 stops
Burst Rate	10fps mechanical	30fps electronic with full AF/AE	↑
Battery Life	~600 shots (CIPA) / ~70min continuous 4K recording	~430 shots (CIPA)	↓
Weight	699g (body, battery, card)	737g (with battery)	↓
Weather Sealed	Yes	Yes
Viewfinder	OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made	EVF, 9.44M dots, 0.90× magnification, 240fps
Screen	3.0" vari-angle touchscreen, 1.44M dots	3.0" fully tilting touchscreen
Mount	Sony E-mount	Sony FE mount (full-frame E-mount)
Memory Cards	Dual CFexpress Type A / SD UHS-II (both slots)	Dual CFexpress Type A / SD UHS-II

Compare side-by-side

See A7S III and A1 next to each other with our interactive comparison tool.

Get a personalised upgrade score

Tell us what you shoot and we'll score the A1 against your specific genres — not just specs.

Other upgrades from the A7S III

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