Canon EOS R3vs EOS RPvs Sigma fp L
Canon
Canon EOS R3 (2021)
From £5999
Best for Sports & photojournalism professionals
View Canon EOS R3
Sigma
Sigma fp L (2021)
From £1999
Best for High-resolution creative & documentary shooters
View Sigma fp L
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.
Entry Full-Frame Stills Photography — EOS RP (2019): An affordable gateway into the RF system. The RP makes sense as a stepping stone camera — if you're committed to Canon RF glass, this is the cheapest full-frame body to buy those lenses for. Just manage expectations on video and battery life.
High-Resolution Creative & Documentary Shooters — Sigma fp L (2021): 61MP and phase-detect AF in the world's smallest full-frame body — the fp L is the most capable iteration of Sigma's extraordinary compact.
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
EOS RP (2019)
- Canon users who want to start investing in RF glass affordably
- Stills photographers who shoot primarily in good light
- Anyone coming from a Canon DSLR wanting the RF system at low cost
- Travel photographers who prioritise compactness over video specs
Sigma fp L (2021)
- You need the highest resolution available in the smallest possible full-frame mirrorless
- You shoot architecture, landscape, or commercial work where fine detail is absolutely critical
- You want the cinematic flexibility of the fp platform paired with maximum megapixel count
Quick take: The sigma fp l has the highest resolution at 61mp; the eos rp 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) | EOS RP (2019) | Sigma fp L (2021) |
|---|---|---|---|
| Price | £5,999 | £799 | £1,999 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 26.2MP Full-Frame CMOS | 61MP full-frame BSI CMOS |
| Resolution | 24.1MP | 26.2MP | 61.0MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/24p (with 1.7× crop), 1080p/60p | 12-bit Cinema DNG RAW, 4K/24p |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Dual Pixel CMOS AF, 4779 manually selectable positions | Phase-detect AF with face/eye detection |
| Stabilisation | 8-stop IBIS | None (no IBIS) | None (lens-based only) |
| Burst Rate | 30fps electronic / 12fps mechanical | 5fps mechanical | 18fps electronic |
| Battery Life | 620 shots (CIPA) | ~250 shots (CIPA) — very limited | 200 shots (CIPA) |
| Weight | 1015g body only | 485g (body, battery, card) | 427g body only |
| Dimensions | 150.0 × 142.6 × 87.2mm | 132.5 × 85.0 × 70.0mm | 112.6 × 69.9 × 45.3mm |
| Weather Sealed | Yes | No | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | EVF, 2.36M dots, 0.70× magnification | None (optional clip-on EVF available) |
| Screen | 3.2" fully articulating touchscreen | 3.0" vari-angle touchscreen, 1.04M dots | 3.15" fixed touchscreen |
| Mount | Canon RF | Canon RF-mount | Leica L-mount |
| Memory Cards | Dual CFexpress Type B | Single SD UHS-II | Single SD UHS-II |
| 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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