Upgrade Guide

Sony A6400→Sony A1 II

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

You own

Sony

A6400

£899

2019

→

Upgrade to

Sony

A1 II

£6500 (+£5,601)

2025

✅

Worthwhile

Clear improvements over the A6400. Whether it justifies the cost depends on which upgrades matter most to your shooting.

What's new in the A1 II

↑

Resolution

50MP vs 24MP (+26MP)
↑

Weather sealing

Added — fully sealed body
↑

Burst rate

30fps electronic (with full AF/AE), 10fps mechanical vs 11fps mechanical, 8fps with AF tracking
↑

Battery life

~530 shots (CIPA) vs ~410 shots (CIPA)
↑

Generation

6 years newer (2025 vs 2019)

Suitability by genre

Full spec comparison

Spec	A6400	A1 II
Price	£899	£6,500
Released	2019	2025	↑
Sensor	24.2MP APS-C Exmor CMOS BSI	50.1MP full-frame stacked BSI CMOS
Resolution	24MP	50MP	↑
Video	4K/30p (6K oversampled, no crop), 1080p/120p slow-motion	8K/30p, 4K/120p 10-bit, 4K/240p super slow-motion
Autofocus	Phase-detect, 425 points, real-time Eye AF & animal AF	AI subject recognition — human, animal, bird, insect, vehicle, aircraft, train
Stabilisation	None (no IBIS)	8.5-stop IBIS (with in-lens OSS)
Burst Rate	11fps mechanical, 8fps with AF tracking	30fps electronic (with full AF/AE), 10fps mechanical	↑
Battery Life	~410 shots (CIPA)	~530 shots (CIPA)	↑
Weight	403g (body, battery, card)	743g body only	↓
Weather Sealed	No	Yes	↑
Viewfinder	EVF, 2.36M dots, 0.70× magnification	EVF 0.9× 9.44M-dot — the highest resolution EVF available
Screen	3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots	3.2" fully articulating touchscreen, 2.1M dots
Mount	Sony E-mount	Sony E-mount (full-frame)
Memory Cards	Single SD UHS-I	Dual CFexpress Type A / SD UHS-II slots

Compare side-by-side

See A6400 and A1 II 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 II against your specific genres — not just specs.

Other upgrades from the A6400

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Camera family history