M10vs A7R III
Sony
A7R III (2017)
Starting from £1799 new
Best for Landscape, studio & commercial photography
View A7R III
GearScore™ Verdict — Which should you buy?
Street & Documentary — M10 (2017): The M10 returned Leica to its roots — thinner, cleaner, and video-free by design. The 24MP sensor is the perfect resolution for a manual-focus rangefinder. The simplified control layout respects the M tradition without digital clutter. A camera for photographers who want to slow down and engage with every frame. One of the most satisfying cameras to use — assuming you have M-mount glass to pair with it.
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
M10 (2017)
- Serious photographers who want to slow down
- Street and documentary photographers
- Leica M-mount lens owners
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 a7r iii is the most affordable; only the a7r iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | M10 (2017) | A7R III (2017) |
|---|---|---|
| Price | £4,000 | £1,799 |
| Sensor | 24MP Full-Frame CMOS | 42.4MP full-frame BSI Exmor R CMOS |
| Resolution | 24.0MP | 42.4MP |
| Video | — | 4K/30p (full-frame readout), 1080p/120p |
| Autofocus | Manual focus (rangefinder coupled) | 399 phase-detect + 425 contrast AF points — real-time Eye AF |
| Stabilisation | None | 5-axis IBIS — 5.5 stops |
| Burst Rate | 5fps | 10fps with AF/AE tracking |
| Battery Life | ~220 shots (CIPA) | ~650 shots (CIPA) |
| Weight | 660g (with battery) | 650g body only |
| Dimensions | 139 × 80 × 38.5mm | 126.9 × 95.6 × 73.7mm |
| Weather Sealed | No | Yes |
| Viewfinder | Optical rangefinder, 0.73× magnification | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.0" fixed LCD, 1.04M dots | 3.0" touchscreen, tilting |
| Mount | Leica M-mount | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single SD UHS-I slot | Dual SD slots (one UHS-II) |
| Connectivity | USB 2.0, Wi-Fi | USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | M10 | A7R III |
|---|---|---|
| Street | ||
| Portrait | ||
| Travel | — | |
| Landscape | ||
| Astrophotography | — | |
| Vlogging & Video | ||
| Sports & Action | — | |
| Wildlife | — | |
| Wedding | — | |
| Sports | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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Camera family history