Canon EOS R3vs OM System TG-7vs A7C II
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.
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.
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
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
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 om system tg-7 is the most affordable; only the canon eos r3, om system tg-7 are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Canon EOS R3 (2021) | OM System TG-7 (2023) | A7C II (2023) |
|---|---|---|---|
| Price | £5,999 | £449 | £1,499 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 12MP BSI CMOS | 33MP Full-frame Exmor R BSI CMOS |
| Resolution | 24.1MP | 12.0MP | 33.0MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/30p, 1080p/120p | 4K/60p oversampled, S-Log3, 10-bit internal |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Hybrid phase/contrast AF | 759-point phase-detect, AI subject recognition |
| Stabilisation | 8-stop IBIS | Digital IS | 5-axis IBIS, 7.0 stops |
| Burst Rate | 30fps electronic / 12fps mechanical | 20fps | 10fps mechanical, 30fps electronic |
| Battery Life | 620 shots (CIPA) | 340 shots (CIPA) | ~530 shots (CIPA) |
| Weight | 1015g body only | 253g | 514g body only |
| Dimensions | 150.0 × 142.6 × 87.2mm | 113.0 × 66.5 × 32.7mm | 124.0 × 71.1 × 63.4mm |
| Weather Sealed | Yes | Yes | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | None | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.2" fully articulating touchscreen | 3.0" fixed TFT LCD | 3.0" vari-angle touchscreen |
| Mount | Canon RF | Fixed 25mm-equiv f/2.0 lens (4× optical zoom) | Sony FE (full-frame E-mount) |
| Memory Cards | Dual CFexpress Type B | Single SD UHS-I | 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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