Canon EOS R3vs Z6 IIIvs 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.
Hybrid Video & Action — Z6 III (2024): Partial-stacked FF sensor for near-zero blackout, 6K RAW video, and 60fps burst — Nikon's most capable hybrid.
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
Z6 III (2024)
- You need the best all-round full-frame camera in Nikon's Z system
- You shoot in challenging or low light and need exceptional high-ISO performance
- You want a hybrid body that genuinely excels at both professional stills and video
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 sigma fp is the most affordable; only the canon eos r3, z6 iii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Canon EOS R3 (2021) | Z6 III (2024) | Sigma fp (2019) |
|---|---|---|---|
| Price | £5,999 | £2,199 | £1,499 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 24.5MP Full-frame Partial-stacked CMOS | 24.6MP full-frame Bayer CMOS |
| Resolution | 24.1MP | 24.5MP | 24.6MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 6K/60p RAW, 4K/120p, 4K/60p oversampled, N-Log, 10-bit | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Phase-detect, 273 points, subject detection (human/animal/vehicle/aircraft) | Contrast-detect AF with face/eye detection |
| Stabilisation | 8-stop IBIS | 5-axis IBIS, 6.0 stops | None (lens-based only) |
| Burst Rate | 30fps electronic / 12fps mechanical | 20fps mechanical, 60fps electronic | 18fps electronic |
| Battery Life | 620 shots (CIPA) | ~380 shots (CIPA) | 200 shots (CIPA) |
| Weight | 1015g body only | 760g body only | 422g body only |
| Dimensions | 150.0 × 142.6 × 87.2mm | 138.5 × 101.5 × 74.0mm | 112.6 × 69.9 × 45.3mm |
| Weather Sealed | Yes | Yes | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | EVF, 5.76M dots, 0.90× magnification | None |
| Screen | 3.2" fully articulating touchscreen | 3.2" fully articulating touchscreen | 3.15" fixed touchscreen |
| Mount | Canon RF | Nikon Z-mount (full-frame) | Leica L-mount |
| Memory Cards | Dual CFexpress Type B | Dual slots: CFexpress Type B + SD UHS-II | Single SD UHS-II + CFexpress Type B (via adapter) |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | USB-C 3.2, Bluetooth, Wi-Fi | USB-C 3.1, Wi-Fi, Bluetooth |
Compare pairs from this group