Upgrade Guide

Sony A7 IV→Sony Sony A9 III

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

You own

Sony

A7 IV

£2299

2021

→

Upgrade to

Sony

Sony A9 III

£5999 (+£3,700)

2023

✅

Worthwhile

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

What's new in the Sony A9 III

↑

Stabilisation

Improved — 8-stop IBIS
↑

Burst rate

120fps blackout-free electronic vs 10fps mechanical, 30fps electronic
↑

Generation

2 years newer (2023 vs 2021)

Unchanged or similar

Suitability by genre

Full spec comparison

Spec	A7 IV	Sony A9 III
Price	£2,299	£5,999
Released	2021	2023	↑
Sensor	33MP Full-frame BSI Exmor R CMOS	24.6MP full-frame Exmor RS CMOS (global shutter)
Resolution	33MP	25MP	↓
Video	4K/60p oversampled, 10-bit internal, S-Log3, S-Cinetone	4K/120p, 4K/60p, 1080p/240p
Autofocus	759-point phase-detect, AI subject recognition	AI subject recognition AF, 759-point phase-detect
Stabilisation	5-axis IBIS, 5.5 stops	8-stop IBIS
Burst Rate	10fps mechanical, 30fps electronic	120fps blackout-free electronic	↑
Battery Life	~580 shots (CIPA)	530 shots (CIPA)	↓
Weight	659g body only	703g body only	↓
Weather Sealed	Yes	Yes
Viewfinder	EVF, 3.69M dots, 0.78× magnification	0.64" Quad-XGA OLED EVF, 9.44M dots
Screen	3.0" vari-angle touchscreen	3.2" fully articulating touchscreen
Mount	Sony FE (full-frame E-mount)	Sony FE (E-mount)
Memory Cards	Dual slots: CFexpress Type A + SD UHS-II	Dual CFexpress Type A / SD UHS-II

Compare side-by-side

See A7 IV and Sony A9 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 Sony A9 III against your specific genres — not just specs.

Other upgrades from the A7 IV

Related buying guides

Camera family history