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EOS R5 Cvs Pentax K-3 Mark III

GearFrame · Updated March 2026

Canon EOS R5 C Canon EOS R5 C (2022) Starting from £3799 new Best for Professional video, documentary & hybrid commercial work View EOS R5 C
VS
Pentax Pentax K-3 Mark III Pentax Pentax K-3 Mark III (2021) Starting from £1699 new Best for DSLR enthusiasts & outdoor photographers View Pentax K-3 Mark III

GearScore™ Verdict — Which should you buy?

Professional Video, Documentary & Hybrid Commercial Work — EOS R5 C (2022): Canon's R5 reborn for cinema — 8K RAW unlimited, Cinema EOS colour science, and 45MP stills in a weather-sealed body.

Dslr Enthusiasts & Outdoor Photographers — Pentax K-3 Mark III (2021): The finest APS-C DSLR ever made — class-leading weather sealing, optical viewfinder, 5-axis IBIS, and extraordinary build for photographers committed to DSLR.

↓ Full specifications below

EOS R5 C (2022)

  • Videographers and cinematographers who want Canon Cinema EOS quality in a compact, run-and-gun body
  • Hybrid photographers who shoot high-end stills and need 8K RAW video capability in the same body
  • Documentary filmmakers who want unlimited recording with a built-in fan
  • RF lens owners who want to add a dedicated cinema body to their Canon system

Pentax K-3 Mark III (2021)

  • DSLR photographers who want the finest APS-C optical viewfinder experience
  • Outdoor and weather photographers who need robust all-weather sealing
  • Pentax lens owners who want to use their existing K-mount glass
  • Photographers who prefer optical viewfinders and refuse to switch to mirrorless

Quick take: The eos r5 c has the highest resolution at 45mp; the pentax k-3 mark iii is the most affordable. Scroll down for the full spec breakdown.

Full specifications

Specification EOS R5 C (2022)Pentax K-3 Mark III (2021)
Price £3,799 £1,699
Sensor 45MP full-frame CMOS — Cinema EOS colour science 25.7MP APS-C BSI CMOS (AA-filterless)
Resolution 45.0MP 25.7MP
Video 8K RAW internal, 8K/30p, 4K/120p — Cinema RAW Light, C-Log2, C-Log3 4K/30p, 1080p/60p
Autofocus Dual Pixel CMOS AF II — subject tracking with Intelligent AF SAFOX 13 phase-detect, 101-point (25 cross-type)
Stabilisation 5-axis IBIS — 8 stops (with IS lens) 5.5-stop 5-axis IBIS (Shake Reduction III)
Burst Rate 12fps mechanical, 20fps electronic 12fps
Battery Life ~220 shots stills / unlimited video with fan 800 shots (CIPA)
Weight 680g body only 820g body only
Dimensions 138.5 × 98.0 × 88.0mm 134.5 × 103.5 × 73.5mm
Weather Sealed Yes Yes
Viewfinder EVF 0.76× 5.76M-dot OLED Optical pentaprism, 100% coverage, 1.05× magnification
Screen 3.0" fully articulating touchscreen, 2.1M dots 3.2" tilting touchscreen
Mount Canon RF mount (full-frame) Pentax KF-mount
Memory Cards Dual CFexpress Type B slots Dual SD UHS-II
Connectivity USB-C, 12G-SDI, HDMI full-size, 3.5mm XLR via adapter, Wi-Fi, Bluetooth USB-C, Wi-Fi, Bluetooth
Genre EOS R5 CPentax K-3 Mark III
Vlogging & Video
9.0
4.0
Portrait
9.0
7.0
Landscape
9.0
9.0
Wedding
9.0
Sports
7.0
Travel
4.0
7.0
Wildlife
9.0
Sports & Action
9.0
⚡ Compare specs side by side EOS R5 C prices → Pentax K-3 Mark III prices →

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