EOS R100vs GFX 50S IIvs A6400
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.
Studio & Portrait Specialists — GFX 50S II (2021): Medium format quality at the most accessible price ever — 51MP detail and tonal richness no APS-C or full-frame body can replicate.
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
GFX 50S II (2021)
- You want to experience medium format without a five-figure investment
- You shoot landscape, architecture, or portraits where resolution and tonal depth matter
- You're in the Fujifilm ecosystem and want to step up to a larger sensor
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 gfx 50s ii has the highest resolution at 51mp; the eos r100 is the most affordable; only the gfx 50s ii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R100 (2023) | GFX 50S II (2021) | A6400 (2019) |
|---|---|---|---|
| Price | £529 | £2,999 | £899 |
| Sensor | 24.1MP APS-C CMOS | 51.4MP Medium Format GFX 44×33mm BSI CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 24.1MP | 51.4MP | 24.2MP |
| Video | 4K/30p (slight crop), 1080p/60p | 4K/30p (cropped) | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Dual Pixel CMOS AF, face detection, subject tracking | Phase-detect, 425 points | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | None (no IBIS) | 5-axis IBIS, 6.5 stops | None (no IBIS) |
| Burst Rate | 6.5fps mechanical | 3fps | 11fps mechanical, 8fps with AF tracking |
| Battery Life | ~270 shots (CIPA) | ~440 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 356g (body, battery, card) | 900g body only | 403g (body, battery, card) |
| Dimensions | 116.3 × 85.5 × 68.8mm | 150.0 × 104.2 × 87.2mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | No | Yes | No |
| Viewfinder | EVF, 2.36M dots, 0.59× magnification | EVF, 3.69M dots, 0.77× magnification | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.0" fixed touchscreen, 1.04M dots | 3.2" tilting touchscreen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Canon RF-mount | Fujifilm G-mount (medium format) | Sony E-mount |
| Memory Cards | Single SD UHS-II | Dual SD UHS-II slots | Single SD UHS-I |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C, Bluetooth, Wi-Fi | Micro-USB, Wi-Fi, Bluetooth, NFC |
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