Canon EOS R3vs Pentax K-3 Mark IIIvs A7C II
Canon
Canon EOS R3 (2021)
From £5999
Best for Sports & photojournalism professionals
View Canon EOS R3
Pentax
Pentax K-3 Mark III (2021)
From £1699
Best for DSLR enthusiasts & outdoor photographers
View Pentax K-3 Mark III
Which should you buy?
Sports & Photojournalism Professionals — Canon EOS R3 (2021): The pinnacle of Canon's mirrorless lineup for speed — Eye Control AF and 30fps burst in the most rugged body Canon has ever produced.
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-Frame Hybrid — A7C II (2023): Full-frame AI autofocus in the most compact body available — the best camera under £1,500 for hybrid shooters.
Who should buy what
Canon EOS R3 (2021)
- You shoot sport, motorsport, wildlife, or news at a professional level
- You need Canon's most reliable and fastest autofocus available
- You need extreme weather sealing for demanding shooting conditions
Pentax K-3 Mark III (2021)
- You're a committed DSLR photographer with significant investment in Pentax glass
- You shoot in extreme weather conditions and place build quality and reliability above everything
- You prefer optical viewfinder performance and want the best modern APS-C DSLR available
A7C II (2023)
- You want full-frame image quality in the most compact body possible
- You travel constantly and need a serious camera that doesn't weigh down your bag
- You're a portrait or lifestyle photographer who shoots on the move
- You create content for social media or YouTube and want full-frame quality in a vlog-friendly form
Quick take: The a7c ii has the highest resolution at 33mp; the a7c ii is the most affordable; only the canon eos r3, pentax k-3 mark iii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Canon EOS R3 (2021) | Pentax K-3 Mark III (2021) | A7C II (2023) |
|---|---|---|---|
| Price | £5,999 | £1,699 | £1,499 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 25.7MP APS-C BSI CMOS (AA-filterless) | 33MP Full-frame Exmor R BSI CMOS |
| Resolution | 24.1MP | 25.7MP | 33.0MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/30p, 1080p/60p | 4K/60p oversampled, S-Log3, 10-bit internal |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | SAFOX 13 phase-detect, 101-point (25 cross-type) | 759-point phase-detect, AI subject recognition |
| Stabilisation | 8-stop IBIS | 5.5-stop 5-axis IBIS (Shake Reduction III) | 5-axis IBIS, 7.0 stops |
| Burst Rate | 30fps electronic / 12fps mechanical | 12fps | 10fps mechanical, 30fps electronic |
| Battery Life | 620 shots (CIPA) | 800 shots (CIPA) | ~530 shots (CIPA) |
| Weight | 1015g body only | 820g body only | 514g body only |
| Dimensions | 150.0 × 142.6 × 87.2mm | 134.5 × 103.5 × 73.5mm | 124.0 × 71.1 × 63.4mm |
| Weather Sealed | Yes | Yes | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | Optical pentaprism, 100% coverage, 1.05× magnification | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.2" fully articulating touchscreen | 3.2" tilting touchscreen | 3.0" vari-angle touchscreen |
| Mount | Canon RF | Pentax KF-mount | Sony FE (full-frame E-mount) |
| Memory Cards | Dual CFexpress Type B | Dual SD UHS-II | Dual slots: SD UHS-II + CFexpress Type A |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | USB-C, Wi-Fi, Bluetooth | USB-C (3.2), Bluetooth, Wi-Fi |
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