EOS-1D X Mark IIIvs EOS Mvs EOS R5

GearFrame · Updated March 2026

Canon EOS-1D X Mark III (2020) Starting from £3500 new Best for Professional Sports, Wildlife & Press Photography View EOS-1D X Mark III

Canon EOS M (2012) Starting from £80 new Best for Canon mirrorless history & EF-M collectors View EOS M

Canon EOS R5 (2020) Starting from £2499 new Best for Professional hybrid shooters, portrait & wildlife View EOS R5

GearScore™ Verdict — Which should you buy?

Professional Sports, Wildlife & Press Photography — EOS-1D X Mark III (2020): Canon's DSLR masterpiece — 20fps live view, 5.5K RAW, 191 cross-type AF points, and dual CFexpress. Almost certainly the finest optical viewfinder camera ever made.

Canon Mirrorless History & Ef-M Collectors — EOS M (2012): Canon's first mirrorless — a historic body that broke new ground with touch-AF and EF-M, but its sluggish contrast-detect system quickly became its Achilles heel.

Professional Hybrid Shooters, Portrait & Wildlife — EOS R5 (2020): A landmark camera — 8K video and 45MP in one body set the standard for what mirrorless could be.

↓ Full specifications below

Who should buy what

EOS-1D X Mark III (2020)

Sports and wildlife photographers with a Canon EF lens collection
Professionals who prefer the optical viewfinder experience
Press photographers who need 20fps, weather sealing, and Ethernet
Canon historians who want to mark the end of the EOS-1D DSLR era

EOS M (2012)

Canon shooters who want the camera that started Canon's mirrorless story
Budget first-time mirrorless buyers who already own EF/EF-S glass
Collectors of significant digital camera milestones

EOS R5 (2020)

Professional photographers who need both resolution and video in one body
Wildlife and sports photographers who want top AF with 20fps burst
Hybrid shooters who need 8K or 4K/120p alongside high-resolution stills
R5 Mark II buyers on a budget — the R5 still delivers exceptional results

Quick take: The eos r5 has the highest resolution at 45mp; the eos m is the most affordable; only the eos-1d x mark iii, eos r5 are weather sealed. Scroll down for the full spec breakdown.

Full specifications

Specification	EOS-1D X Mark III (2020)	EOS M (2012)	EOS R5 (2020)
Price	£3,500	£80	£2,499
Sensor	20.1MP full-frame CMOS	18MP APS-C CMOS	45MP Full-Frame CMOS
Resolution	20.1MP	18.0MP	45.0MP
Video	5.5K RAW, 4K 60fps (crop), 4K 60fps (full-frame via firmware)	1080p 30fps	8K RAW/30p, 4K/120p, 1080p/120p
Autofocus	191-point all cross-type OVF AF; 525-point Dual Pixel CMOS AF (Live View)	Contrast-detect AF only — notoriously slow	Dual Pixel CMOS AF II — 1053 AF zones, subject/animal detection
Stabilisation	—	—	IBIS — up to 8 stops combined with IS lenses
Burst Rate	16fps mechanical, 20fps live view	4fps	12fps mechanical, 20fps electronic
Battery Life	~2850 shots (CIPA)	~230 shots (CIPA)	~320 shots (CIPA)
Weight	1250g (body only)	262g (body only)	650g (with battery)
Dimensions	158 × 167.6 × 82.6mm	108.6 × 66.5 × 32.3mm	138.5 × 97.5 × 88mm
Weather Sealed	Yes	No	Yes
Viewfinder	OVF 0.76× magnification, 100% coverage	None (optional EVF accessory)	EVF, 5.76M dots, 0.76× magnification
Screen	3.2" fully articulating touchscreen, 4.15M dots	3.0" fixed touchscreen, 1.04M dots	3.15" fully articulating touchscreen
Mount	Canon EF	Canon EF-M mount	Canon RF mount
Memory Cards	Dual CFexpress Type B slots	1× SD/SDHC/SDXC	CFexpress Type B + SD UHS-II
Connectivity	Wi-Fi 5GHz, Bluetooth 4.2, USB-C 3.1 Gen 2, Ethernet	USB 2.0	USB-C, Wi-Fi, Bluetooth, HDMI

Suitability by genre

Genre	EOS-1D X Mark III	EOS M	EOS R5
Sports & Action	10.0	—	—
Wildlife	9.0	—	9.0
Wedding & Events	9.0	—	—
Portrait	8.0	6.0	9.0
Vlogging & Video	7.0	5.0	9.0
Street	7.0	6.0	—
Landscape	7.0	—	9.0
Casual	—	7.0	—
Travel	—	6.0	—
Sports	—	—	9.0
Wedding	—	—	9.0

GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →

⚡ Compare specs side by side EOS-1D X Mark III prices → EOS M prices → EOS R5 prices →

Compare pairs from this group

Camera family history