Canon EOS R3vs OM-D E-M10 IVvs 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.
Travel & Everyday — OM-D E-M10 IV (2020): Compact Micro Four Thirds body with built-in IBIS — ideal for travellers who want stability without bulk.
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-D E-M10 IV (2020)
- You're new to mirrorless and want a small, uncomplicated first camera to learn on
- You want excellent in-body stabilisation to steady handheld video and shake-prone shooting
- You're drawn to the Micro Four Thirds ecosystem and want to start at the entry level
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-d e-m10 iv is the most affordable; only the canon eos r3 is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Canon EOS R3 (2021) | OM-D E-M10 IV (2020) | Sigma fp (2019) |
|---|---|---|---|
| Price | £5,999 | £469 | £1,499 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 20.3MP Micro Four Thirds Live MOS | 24.6MP full-frame Bayer CMOS |
| Resolution | 24.1MP | 20.3MP | 24.6MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/30p, 1080p/60p | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Phase-detect + contrast detect, 121 points | Contrast-detect AF with face/eye detection |
| Stabilisation | 8-stop IBIS | 5-axis IBIS, 4.5 stops | None (lens-based only) |
| Burst Rate | 30fps electronic / 12fps mechanical | 15fps | 18fps electronic |
| Battery Life | 620 shots (CIPA) | ~360 shots (CIPA) | 200 shots (CIPA) |
| Weight | 1015g body only | 383g body only | 422g body only |
| Dimensions | 150.0 × 142.6 × 87.2mm | 121.4 × 83.6 × 49.0mm | 112.6 × 69.9 × 45.3mm |
| Weather Sealed | Yes | No | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | EVF, 2.36M dots, 0.46× magnification | None |
| Screen | 3.2" fully articulating touchscreen | 3.0" tilting touchscreen | 3.15" fixed touchscreen |
| Mount | Canon RF | Micro Four Thirds | Leica L-mount |
| Memory Cards | Dual CFexpress Type B | Single SD UHS-I slot | Single SD UHS-II + CFexpress Type B (via adapter) |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | USB Micro-B, Bluetooth, Wi-Fi, micro HDMI | USB-C 3.1, Wi-Fi, Bluetooth |
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