Canon EOS R3vs OM System TG-7vs Sigma fp
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
Sigma
Sigma fp (2019)
From £1499
Best for Creative filmmakers & experimental photographers
View Sigma fp
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.
Creative Filmmakers & Experimental Photographers — Sigma fp (2019): The smallest full-frame camera in the world — Cinema DNG RAW and L-mount flexibility in a pocket-sized body that rewards creative 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
Sigma fp (2019)
- You're a filmmaker building a cinema rig where the smallest full-frame body is essential
- You want L-mount compatibility to pair with Sigma Art or Leica SL lenses
- You prioritise video and cinema colour over stills ergonomics and functionality
Quick take: The sigma fp has the highest resolution at 25mp; 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) | Sigma fp (2019) |
|---|---|---|---|
| Price | £5,999 | £449 | £1,499 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 12MP BSI CMOS | 24.6MP full-frame Bayer CMOS |
| Resolution | 24.1MP | 12.0MP | 24.6MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/30p, 1080p/120p | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Hybrid phase/contrast AF | Contrast-detect AF with face/eye detection |
| Stabilisation | 8-stop IBIS | Digital IS | None (lens-based only) |
| Burst Rate | 30fps electronic / 12fps mechanical | 20fps | 18fps electronic |
| Battery Life | 620 shots (CIPA) | 340 shots (CIPA) | 200 shots (CIPA) |
| Weight | 1015g body only | 253g | 422g body only |
| Dimensions | 150.0 × 142.6 × 87.2mm | 113.0 × 66.5 × 32.7mm | 112.6 × 69.9 × 45.3mm |
| Weather Sealed | Yes | Yes | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | None | None |
| Screen | 3.2" fully articulating touchscreen | 3.0" fixed TFT LCD | 3.15" fixed touchscreen |
| Mount | Canon RF | Fixed 25mm-equiv f/2.0 lens (4× optical zoom) | Leica L-mount |
| Memory Cards | Dual CFexpress Type B | Single SD UHS-I | Single SD UHS-II + CFexpress Type B (via adapter) |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | USB-C, Wi-Fi, Bluetooth | USB-C 3.1, Wi-Fi, Bluetooth |
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