Canon EOS R3vs Z7 IIvs OM System TG-7
Canon
Canon EOS R3 (2021)
From £5999
Best for Sports & photojournalism professionals
View Canon EOS R3
OM System
OM System TG-7 (2023)
From £449
Best for Adventure, underwater & outdoor use
View OM System TG-7
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.
Landscape & Studio / High-Resolution — Z7 II (2020): The Z7 II is a landscape and studio camera first, everything else second. 45.7MP with weather sealing and dual card slots is a compelling package. If you need resolution, it delivers. If you don't, the Z6 II is the smarter buy.
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.
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
Z7 II (2020)
- Landscape photographers who print large or need to crop significantly
- Studio and commercial photographers requiring maximum resolution
- Architecture photographers where detail is non-negotiable
- Fine-art photographers who shoot primarily from a tripod
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
Quick take: The z7 ii has the highest resolution at 46mp; the om system tg-7 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | Canon EOS R3 (2021) | Z7 II (2020) | OM System TG-7 (2023) |
|---|---|---|---|
| Price | £5,999 | £2,699 | £449 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 45.7MP Full-Frame BSI CMOS | 12MP BSI CMOS |
| Resolution | 24.1MP | 45.7MP | 12.0MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/60p, 4K/30p (oversampled), 1080p/120p slow-motion | 4K/30p, 1080p/120p |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Phase-detect, 493 points, Eye AF, subject tracking | Hybrid phase/contrast AF |
| Stabilisation | 8-stop IBIS | 5-axis IBIS, 5 stops (up to 6 stops with VR lenses) | Digital IS |
| Burst Rate | 30fps electronic / 12fps mechanical | 10fps mechanical, 10fps electronic | 20fps |
| Battery Life | 620 shots (CIPA) | ~420 shots (CIPA) | 340 shots (CIPA) |
| Weight | 1015g body only | 705g (body, battery, card) | 253g |
| Dimensions | 150.0 × 142.6 × 87.2mm | 134.0 × 100.5 × 69.5mm | 113.0 × 66.5 × 32.7mm |
| Weather Sealed | Yes | Yes | Yes |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | EVF, 3.69M dots, 0.80× magnification | None |
| Screen | 3.2" fully articulating touchscreen | 3.2" tilting touchscreen, 2.1M dots | 3.0" fixed TFT LCD |
| Mount | Canon RF | Nikon Z-mount | Fixed 25mm-equiv f/2.0 lens (4× optical zoom) |
| Memory Cards | Dual CFexpress Type B | Dual card: 1× CFexpress Type B / XQD + 1× SD UHS-II | Single SD UHS-I |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | USB-C (USB 3.2 Gen 2), Wi-Fi, Bluetooth | USB-C, Wi-Fi, Bluetooth |
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