EOS R7vs Pentax K-3 Mark IIIvs A7 IV
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?
Wildlife, Sports & Action — EOS R7 (2022): The EOS R7 is one of the most complete APS-C cameras ever made. It combines a class-leading resolution sensor with best-in-class IBIS, 4K/60p video, weather sealing and 15fps burst. For wildlife, sports and action photographers on an APS-C budget, nothing else comes close.
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.
Portrait & Wedding Photography — A7 IV (2021): The full-frame portrait benchmark — 33MP, AI Eye AF, and exceptional skin-tone rendering in a pro-grade hybrid body.
Who should buy what
EOS R7 (2022)
- Wildlife photographers who need reach, weather sealing and fast burst
- Sports shooters upgrading from entry-level APS-C bodies
- Video creators who need uncropped 4K/60p without a full-frame budget
- Canon DSLR users looking to move to RF mount
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
A7 IV (2021)
- You want a high-resolution full-frame all-rounder for portraits, weddings, or travel
- You're stepping up from APS-C or a DSLR and want the best all-round full-frame body under £3,000
- You shoot a mix of stills and video and need a single body that handles both seriously
- You want access to the widest lens ecosystem in the mirrorless market
Quick take: The a7 iv has the highest resolution at 33mp; the eos r7 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R7 (2022) | Pentax K-3 Mark III (2021) | A7 IV (2021) |
|---|---|---|---|
| Price | £1,399 | £1,699 | £2,299 |
| Sensor | 32.5MP APS-C CMOS | 25.7MP APS-C BSI CMOS (AA-filterless) | 33MP Full-frame BSI Exmor R CMOS |
| Resolution | 32.5MP | 25.7MP | 33.0MP |
| Video | 4K/60p (uncropped), 4K/30p (oversampled from 7K), 1080p/120p | 4K/30p, 1080p/60p | 4K/60p oversampled, 10-bit internal, S-Log3, S-Cinetone |
| Autofocus | Dual Pixel CMOS AF II, 651 AF zones, subject recognition (people, animals, vehicles) | SAFOX 13 phase-detect, 101-point (25 cross-type) | 759-point phase-detect, AI subject recognition |
| Stabilisation | 7-stop IBIS (8 stops with compatible IS lenses) | 5.5-stop 5-axis IBIS (Shake Reduction III) | 5-axis IBIS, 5.5 stops |
| Burst Rate | 15fps mechanical, 30fps electronic (with blackout) | 12fps | 10fps mechanical, 30fps electronic |
| Battery Life | ~770 shots (CIPA) | 800 shots (CIPA) | ~580 shots (CIPA) |
| Weight | 612g (body, battery, card) | 820g body only | 659g body only |
| Dimensions | 132.0 × 90.4 × 91.7mm | 134.5 × 103.5 × 73.5mm | 131.3 × 96.4 × 79.8mm |
| Weather Sealed | Yes | Yes | Yes |
| Viewfinder | EVF, 2.36M dots, 0.72× magnification | Optical pentaprism, 100% coverage, 1.05× magnification | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.0" vari-angle touchscreen, 1.62M dots | 3.2" tilting touchscreen | 3.0" vari-angle touchscreen |
| Mount | Canon RF-mount | Pentax KF-mount | Sony FE (full-frame E-mount) |
| Memory Cards | Dual SD UHS-II | Dual SD UHS-II | Dual slots: CFexpress Type A + SD UHS-II |
| Connectivity | USB-C (USB 3.2 Gen 2), Wi-Fi, Bluetooth | USB-C, Wi-Fi, Bluetooth | USB-C (3.2 Gen 2), Bluetooth, Wi-Fi |
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