Canon EOS R3vs OM-1 IIvs Sigma fp
Canon
Canon EOS R3 (2021)
From £5999
Best for Sports & photojournalism professionals
View Canon EOS R3
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.
Wildlife & Action — OM-1 II (2024): 120fps burst, 8-stop IBIS, and IP53 sealing — the most capable wildlife and action camera in the Micro Four Thirds world.
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-1 II (2024)
- You shoot wildlife, birds, or fast action and want the best MFT autofocus available
- You need strong weather sealing without the weight of a full-frame sports body
- You're in the MFT system and want a flagship-level body upgrade
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-1 ii is the most affordable; only the canon eos r3, om-1 ii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Canon EOS R3 (2021) | OM-1 II (2024) | Sigma fp (2019) |
|---|---|---|---|
| Price | £5,999 | £1,499 | £1,499 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 20.4MP Micro Four Thirds Stacked BSI CMOS | 24.6MP full-frame Bayer CMOS |
| Resolution | 24.1MP | 20.4MP | 24.6MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/120p Cinema4K, Apple ProRes RAW (with recorder) | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Quad-Pixel phase-detect, 1053 points, AI subject recognition (birds/animals) | Contrast-detect AF with face/eye detection |
| Stabilisation | 8-stop IBIS | 5-axis IBIS, 8.0 stops (Dual IS) | None (lens-based only) |
| Burst Rate | 30fps electronic / 12fps mechanical | 120fps electronic (blackout-free), 15fps mechanical | 18fps electronic |
| Battery Life | 620 shots (CIPA) | ~520 shots (CIPA) | 200 shots (CIPA) |
| Weight | 1015g body only | 561g body only | 422g body only |
| Dimensions | 150.0 × 142.6 × 87.2mm | 134.8 × 91.6 × 72.7mm | 112.6 × 69.9 × 45.3mm |
| Weather Sealed | Yes | Yes | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | EVF, 5.76M dots, 0.83× magnification | None |
| Screen | 3.2" fully articulating touchscreen | 3.0" fully articulating touchscreen | 3.15" fixed touchscreen |
| Mount | Canon RF | Micro Four Thirds | Leica L-mount |
| Memory Cards | Dual CFexpress Type B | Dual SD UHS-II slots | Single SD UHS-II + CFexpress Type B (via adapter) |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | USB-C, Bluetooth, Wi-Fi | USB-C 3.1, Wi-Fi, Bluetooth |
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