DC-G100Dvs A7R III
Lumix
DC-G100D (2023)
Starting from £649 new
Best for Vlogging, content creation & lightweight travel
View DC-G100D
Sony
A7R III (2017)
Starting from £1799 new
Best for Landscape, studio & commercial photography
View A7R III
GearScore™ Verdict — Which should you buy?
Vlogging, Content Creation & Lightweight Travel — DC-G100D (2023): The lightest capable MFT mirrorless for vloggers — phase-detect AF, directional audio, and the full Lumix lens ecosystem under 350g.
Landscape, Studio & Commercial Photography — A7R III (2017): The camera that converted professionals to mirrorless — 42MP, IBIS, and 10fps in a body that still competes today.
Who should buy what
DC-G100D (2023)
- Content creators who want better quality than a smartphone without the weight of a full-size camera
- Travel vloggers who want the smallest capable MFT camera with a flip screen and mic input
- Photography beginners entering the Lumix MFT system at an accessible price point
- G100 owners who want the upgraded phase-detect AF for better subject tracking
A7R III (2017)
- Landscape and studio photographers who need 42MP resolution at a used-price discount vs A7R IV
- Canon/Nikon DSLR professionals considering a mirrorless switch at a lower investment
- Commercial and product photographers who want full-frame resolution with IBIS for handheld work
- Portrait photographers who want the sharpest possible full-frame files for large print work
Quick take: The a7r iii has the highest resolution at 42mp; the dc-g100d is the most affordable; only the a7r iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | DC-G100D (2023) | A7R III (2017) |
|---|---|---|
| Price | £649 | £1,799 |
| Sensor | 20.3MP Micro Four Thirds Live MOS | 42.4MP full-frame BSI Exmor R CMOS |
| Resolution | 20.3MP | 42.4MP |
| Video | 4K/30p, 4K/24p, 1080p/60p — V-Log L (upgrade) | 4K/30p (full-frame readout), 1080p/120p |
| Autofocus | Phase-detect AF — upgraded from G100's contrast-only DFD | 399 phase-detect + 425 contrast AF points — real-time Eye AF |
| Stabilisation | 2-axis (body); 5-axis Dual IS II when used with OIS lenses | 5-axis IBIS — 5.5 stops |
| Burst Rate | 10fps AF single, 9fps AFS continuous | 10fps with AF/AE tracking |
| Battery Life | ~250 shots (CIPA) | ~650 shots (CIPA) |
| Weight | 333g body only | 650g body only |
| Dimensions | 116.5 × 82.5 × 55.8mm | 126.9 × 95.6 × 73.7mm |
| Weather Sealed | No | Yes |
| Viewfinder | EVF 0.53× 3.68M-dot — pop-up style | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.0" fully articulating touchscreen, 1.84M dots | 3.0" touchscreen, tilting |
| Mount | Micro Four Thirds (MFT) | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single SD/SDHC/SDXC slot | Dual SD slots (one UHS-II) |
| Connectivity | USB-C, 3.5mm mic jack, Bluetooth, Wi-Fi | USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | DC-G100D | A7R III |
|---|---|---|
| Vlogging & Video | ||
| Travel | — | |
| Street | ||
| Portrait | ||
| Landscape | ||
| Sports | ||
| Wedding | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with DC-G100D
Camera family history