Upgrade Guide

Canon EOS-1D X Mark III→Canon Canon EOS R3

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

You own

Canon

EOS-1D X Mark III

£3500

2020

→

Upgrade to

Canon

Canon EOS R3

£5999 (+£2,499)

2021

✅

Worthwhile

Clear improvements over the EOS-1D X Mark III. Whether it justifies the cost depends on which upgrades matter most to your shooting.

What's new in the Canon EOS R3

↑

Resolution

24MP vs 20MP (+4MP)
↑

Stabilisation

IBIS added — significant for handheld and video
↑

Burst rate

30fps electronic / 12fps mechanical vs 16fps mechanical, 20fps live view
↑

Generation

1 year newer (2021 vs 2020)

Suitability by genre

Full spec comparison

Spec	EOS-1D X Mark III	Canon EOS R3
Price	£3,500	£5,999
Released	2020	2021	↑
Sensor	20.1MP full-frame CMOS	24.1MP full-frame BSI stacked CMOS
Resolution	20MP	24MP	↑
Video	5.5K RAW, 4K 60fps (crop), 4K 60fps (full-frame via firmware)	6K RAW, 4K/120p, 1080p/180p
Autofocus	191-point all cross-type OVF AF; 525-point Dual Pixel CMOS AF (Live View)	Dual Pixel CMOS AF II with Eye Control AF
Stabilisation	—	8-stop IBIS
Burst Rate	16fps mechanical, 20fps live view	30fps electronic / 12fps mechanical	↑
Battery Life	~2850 shots (CIPA)	620 shots (CIPA)	↓
Weight	1250g (body only)	1015g body only	↑
Weather Sealed	Yes	Yes
Viewfinder	OVF 0.76× magnification, 100% coverage	0.76" OLED EVF, 5.76M dots, 120fps
Screen	3.2" fully articulating touchscreen, 4.15M dots	3.2" fully articulating touchscreen
Mount	Canon EF	Canon RF
Memory Cards	Dual CFexpress Type B slots	Dual CFexpress Type B

Compare side-by-side

See EOS-1D X Mark III and Canon EOS R3 next to each other with our interactive comparison tool.

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Other upgrades from the EOS-1D X Mark III

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