EOS RPvs Sigma fp Lvs A6400
Sigma
Sigma fp L (2021)
From £1999
Best for High-resolution creative & documentary shooters
View Sigma fp L
Which should you buy?
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.
Content Creation & Vlogging — A6400 (2019): The best value APS-C Sony you can buy — especially used. Real-time Eye AF at this price point was transformative when it launched and still makes it one of the most reliable autofocus systems in the lineup.
Who should buy what
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
A6400 (2019)
- Vloggers and content creators who need a flip screen and reliable AF
- Photographers upgrading from a compact or smartphone
- Beginners who want room to grow into a full E-mount lens ecosystem
- Anyone prioritising autofocus performance at an accessible price
Quick take: The sigma fp l has the highest resolution at 61mp; the eos rp is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS RP (2019) | Sigma fp L (2021) | A6400 (2019) |
|---|---|---|---|
| Price | £799 | £1,999 | £899 |
| Sensor | 26.2MP Full-Frame CMOS | 61MP full-frame BSI CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 26.2MP | 61.0MP | 24.2MP |
| Video | 4K/24p (with 1.7× crop), 1080p/60p | 12-bit Cinema DNG RAW, 4K/24p | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Dual Pixel CMOS AF, 4779 manually selectable positions | Phase-detect AF with face/eye detection | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | None (no IBIS) | None (lens-based only) | None (no IBIS) |
| Burst Rate | 5fps mechanical | 18fps electronic | 11fps mechanical, 8fps with AF tracking |
| Battery Life | ~250 shots (CIPA) — very limited | 200 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 485g (body, battery, card) | 427g body only | 403g (body, battery, card) |
| Dimensions | 132.5 × 85.0 × 70.0mm | 112.6 × 69.9 × 45.3mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | No | No | No |
| Viewfinder | EVF, 2.36M dots, 0.70× magnification | None (optional clip-on EVF available) | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.0" vari-angle touchscreen, 1.04M dots | 3.15" fixed touchscreen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Canon RF-mount | Leica L-mount | Sony E-mount |
| Memory Cards | Single SD UHS-II | Single SD UHS-II | Single SD UHS-I |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C 3.1, Wi-Fi, Bluetooth | Micro-USB, Wi-Fi, Bluetooth, NFC |
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