EOS R100vs Sony A9 IIIvs Sony RX100 VII
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.
Sports & Action Professionals — Sony A9 III (2023): A paradigm-shifting camera — the global shutter eliminates every rolling shutter limitation that has constrained action photography for years.
Travel & Versatility — Sony RX100 VII (2019): The most versatile compact camera ever made — 24-200mm zoom, 20fps burst, and 960fps slow-motion in a jacket pocket.
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
Sony A9 III (2023)
- You shoot professional sport, motorsport, or action and need zero rolling shutter distortion
- You need reliable high-speed flash sync for studio or on-location action work
- You want the absolute pinnacle of Sony's action and sports camera technology
Sony RX100 VII (2019)
- You want serious image quality in a camera small enough to carry absolutely everywhere
- You shoot travel, events, or street photography and want something discreet but genuinely capable
- You need fast burst shooting and reliable autofocus in the most pocketable possible package
Quick take: The sony a9 iii has the highest resolution at 25mp; the eos r100 is the most affordable; only the sony a9 iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R100 (2023) | Sony A9 III (2023) | Sony RX100 VII (2019) |
|---|---|---|---|
| Price | £529 | £5,999 | £1,099 |
| Sensor | 24.1MP APS-C CMOS | 24.6MP full-frame Exmor RS CMOS (global shutter) | 20.1MP 1-inch Exmor RS BSI CMOS (stacked) |
| Resolution | 24.1MP | 24.6MP | 20.1MP |
| Video | 4K/30p (slight crop), 1080p/60p | 4K/120p, 4K/60p, 1080p/240p | 4K/30p HLG, FHD/960fps super slow-motion |
| Autofocus | Dual Pixel CMOS AF, face detection, subject tracking | AI subject recognition AF, 759-point phase-detect | 357-point phase-detect + 425 contrast, Eye AF, tracking |
| Stabilisation | None (no IBIS) | 8-stop IBIS | 3-stop Optical SteadyShot |
| Burst Rate | 6.5fps mechanical | 120fps blackout-free electronic | 20fps AF/AE tracking (90fps short burst) |
| Battery Life | ~270 shots (CIPA) | 530 shots (CIPA) | ~260 shots (CIPA) |
| Weight | 356g (body, battery, card) | 703g body only | 302g with battery and card |
| Dimensions | 116.3 × 85.5 × 68.8mm | 136.1 × 96.9 × 82.9mm | 101.6 × 58.1 × 42.8mm |
| Weather Sealed | No | Yes | No |
| Viewfinder | EVF, 2.36M dots, 0.59× magnification | 0.64" Quad-XGA OLED EVF, 9.44M dots | Pop-up EVF, 2.36M dots, 0.59× magnification |
| Screen | 3.0" fixed touchscreen, 1.04M dots | 3.2" fully articulating touchscreen | 3.0" tilting touchscreen |
| Mount | Canon RF-mount | Sony FE (E-mount) | Fixed Zeiss Vario-Sonnar 24-200mm f/2.8-4.5 |
| Memory Cards | Single SD UHS-II | Dual CFexpress Type A / SD UHS-II | Single SD UHS-I slot |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C 3.2, HDMI A, Wi-Fi 6, Bluetooth 5.3 | USB-C, Bluetooth, Wi-Fi, NFC |
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