OM-D E-M10 IVvs A7S II
Sony
A7S II (2015)
Starting from £799 new
Best for Low-light video, documentary & available-light filmmaking
View A7S II
GearScore™ Verdict — Which should you buy?
Travel & Everyday — OM-D E-M10 IV (2020): Compact Micro Four Thirds body with built-in IBIS — ideal for travellers who want stability without bulk.
Low-Light Video, Documentary & Available-Light Filmmaking — A7S II (2015): A landmark in mirrorless history — the first Sony with IBIS and internal 4K, its low-light video capability still impresses today at a used-market price.
Who should buy what
OM-D E-M10 IV (2020)
- Beginners and enthusiasts who want a compact, stylish Micro Four Thirds camera
- Travellers who want a small, light system without sacrificing image quality
- Smartphone upgraders who want a proper camera that still fits in a bag
- Anyone who wants built-in selfie capability in a traditional camera body
A7S II (2015)
- Filmmakers and videographers who want legendary low-light performance at a used-price discount
- Documentary shooters working in unpredictable available light conditions
- A7S III shooters who want a second Sony FE body for backup or B-camera use
- Budget-conscious video producers who want full-frame 4K with S-Log at an accessible price
Quick take: The om-d e-m10 iv has the highest resolution at 20mp; the om-d e-m10 iv is the most affordable; only the a7s ii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | OM-D E-M10 IV (2020) | A7S II (2015) |
|---|---|---|
| Price | £469 | £799 |
| Sensor | 20.3MP Micro Four Thirds Live MOS | 12.1MP full-frame BSI Exmor CMOS |
| Resolution | 20.3MP | 12.1MP |
| Video | 4K/30p, 1080p/60p | 4K/30p internal (full sensor readout), 1080p/120p, S-Log2/S-Log3 |
| Autofocus | Phase-detect + contrast detect, 121 points | 169 phase-detect + 25 contrast AF — limited by modern standards |
| Stabilisation | 5-axis IBIS, 4.5 stops | 5-axis IBIS — 4.5 stops (first Sony mirrorless with IBIS) |
| Burst Rate | 15fps | 5fps continuous |
| Battery Life | ~360 shots (CIPA) | ~370 shots (CIPA) |
| Weight | 383g body only | 584g body only |
| Dimensions | 121.4 × 83.6 × 49.0mm | 126.9 × 95.7 × 60.3mm |
| Weather Sealed | No | Yes |
| Viewfinder | EVF, 2.36M dots, 0.46× magnification | EVF, 2.36M dots, 0.71× magnification |
| Screen | 3.0" tilting touchscreen | 3.0" tilting LCD, 1.23M dots |
| Mount | Micro Four Thirds | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single SD UHS-I slot | Dual SD UHS-I slots |
| Connectivity | USB Micro-B, Bluetooth, Wi-Fi, micro HDMI | USB Micro-B, Bluetooth (via app), Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | OM-D E-M10 IV | A7S II |
|---|---|---|
| Travel | — | |
| Street | ||
| Family & Everyday | — | |
| Portrait | ||
| Landscape | — | |
| Sports & Action | — | |
| Vlogging & Video | — | |
| Low Light | — | |
| Wedding | — | |
| Sports | — |
More comparisons with OM-D E-M10 IV
Camera family history