EOS R100vs 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?
First Camera / Beginner Photography — EOS R100 (2023): The R100 does the basics well at the lowest possible price point. Its main value is as a gateway into the Canon RF ecosystem — the lenses you buy now will work on any Canon body you upgrade to later. Modest ambitions, reliably met.
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 R100 (2023)
- First-time camera buyers stepping up from a smartphone
- Students and hobbyists wanting an affordable starting point
- Anyone who wants to start investing in Canon RF glass on a budget
- Casual photographers who don't need advanced video or speed
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 r100 is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R100 (2023) | Sigma fp L (2021) | A6400 (2019) |
|---|---|---|---|
| Price | £529 | £1,999 | £899 |
| Sensor | 24.1MP APS-C CMOS | 61MP full-frame BSI CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 24.1MP | 61.0MP | 24.2MP |
| Video | 4K/30p (slight 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, face detection, subject tracking | 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 | 6.5fps mechanical | 18fps electronic | 11fps mechanical, 8fps with AF tracking |
| Battery Life | ~270 shots (CIPA) | 200 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 356g (body, battery, card) | 427g body only | 403g (body, battery, card) |
| Dimensions | 116.3 × 85.5 × 68.8mm | 112.6 × 69.9 × 45.3mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | No | No | No |
| Viewfinder | EVF, 2.36M dots, 0.59× magnification | None (optional clip-on EVF available) | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.0" fixed 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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