GFX 50S IIvs OM System TG-7vs Pentax K-3 Mark III
OM System
OM System TG-7 (2023)
From £449
Best for Adventure, underwater & outdoor use
View OM System TG-7
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?
Studio & Portrait Specialists — GFX 50S II (2021): Medium format quality at the most accessible price ever — 51MP detail and tonal richness no APS-C or full-frame body can replicate.
Adventure, Underwater & Outdoor Use — OM System TG-7 (2023): Waterproof to 15m, freezeproof and shockproof — the TG-7 is the most capable rugged compact for adventure and outdoor use.
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
GFX 50S II (2021)
- You want to experience medium format without a five-figure investment
- You shoot landscape, architecture, or portraits where resolution and tonal depth matter
- You're in the Fujifilm ecosystem and want to step up to a larger sensor
OM System TG-7 (2023)
- You dive, surf, kayak, ski, or hike and need a camera that genuinely survives anything
- You want a waterproof backup or travel camera that doesn't require a separate housing
- You need a rugged compact for adventure, outdoor, and underwater activities
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
Quick take: The gfx 50s ii has the highest resolution at 51mp; the om system tg-7 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | GFX 50S II (2021) | OM System TG-7 (2023) | Pentax K-3 Mark III (2021) |
|---|---|---|---|
| Price | £2,999 | £449 | £1,699 |
| Sensor | 51.4MP Medium Format GFX 44×33mm BSI CMOS | 12MP BSI CMOS | 25.7MP APS-C BSI CMOS (AA-filterless) |
| Resolution | 51.4MP | 12.0MP | 25.7MP |
| Video | 4K/30p (cropped) | 4K/30p, 1080p/120p | 4K/30p, 1080p/60p |
| Autofocus | Phase-detect, 425 points | Hybrid phase/contrast AF | SAFOX 13 phase-detect, 101-point (25 cross-type) |
| Stabilisation | 5-axis IBIS, 6.5 stops | Digital IS | 5.5-stop 5-axis IBIS (Shake Reduction III) |
| Burst Rate | 3fps | 20fps | 12fps |
| Battery Life | ~440 shots (CIPA) | 340 shots (CIPA) | 800 shots (CIPA) |
| Weight | 900g body only | 253g | 820g body only |
| Dimensions | 150.0 × 104.2 × 87.2mm | 113.0 × 66.5 × 32.7mm | 134.5 × 103.5 × 73.5mm |
| Weather Sealed | Yes | Yes | Yes |
| Viewfinder | EVF, 3.69M dots, 0.77× magnification | None | Optical pentaprism, 100% coverage, 1.05× magnification |
| Screen | 3.2" tilting touchscreen | 3.0" fixed TFT LCD | 3.2" tilting touchscreen |
| Mount | Fujifilm G-mount (medium format) | Fixed 25mm-equiv f/2.0 lens (4× optical zoom) | Pentax KF-mount |
| Memory Cards | Dual SD UHS-II slots | Single SD UHS-I | Dual SD UHS-II |
| Connectivity | USB-C, Bluetooth, Wi-Fi | USB-C, Wi-Fi, Bluetooth | USB-C, Wi-Fi, Bluetooth |
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