EOS R5vs Pentax K-3 Mark III
Canon
EOS R5 (2020)
Starting from £2499 new
Best for Professional hybrid shooters, portrait & wildlife
View EOS R5
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 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.
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.
Who should buy what
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
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 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 (2020) | Pentax K-3 Mark III (2021) |
|---|---|---|
| Price | £2,499 | £1,699 |
| Sensor | 45MP Full-Frame CMOS | 25.7MP APS-C BSI CMOS (AA-filterless) |
| Resolution | 45.0MP | 25.7MP |
| Video | 8K RAW/30p, 4K/120p, 1080p/120p | 4K/30p, 1080p/60p |
| Autofocus | Dual Pixel CMOS AF II — 1053 AF zones, subject/animal detection | SAFOX 13 phase-detect, 101-point (25 cross-type) |
| Stabilisation | IBIS — up to 8 stops combined with IS lenses | 5.5-stop 5-axis IBIS (Shake Reduction III) |
| Burst Rate | 12fps mechanical, 20fps electronic | 12fps |
| Battery Life | ~320 shots (CIPA) | 800 shots (CIPA) |
| Weight | 650g (with battery) | 820g body only |
| Dimensions | 138.5 × 97.5 × 88mm | 134.5 × 103.5 × 73.5mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 5.76M dots, 0.76× magnification | Optical pentaprism, 100% coverage, 1.05× magnification |
| Screen | 3.15" fully articulating touchscreen | 3.2" tilting touchscreen |
| Mount | Canon RF mount | Pentax KF-mount |
| Memory Cards | CFexpress Type B + SD UHS-II | Dual SD UHS-II |
| Connectivity | USB-C, Wi-Fi, Bluetooth, HDMI | USB-C, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | EOS R5 | Pentax K-3 Mark III |
|---|---|---|
| Portrait | ||
| Wildlife | ||
| Vlogging & Video | ||
| Sports | — | |
| Landscape | ||
| Wedding | — | |
| Sports & Action | — | |
| Travel | — |
More comparisons with EOS R5
Camera family history