Sigma fpvs A7S II
Sigma
Sigma fp (2019)
Starting from £1499 new
Best for Creative filmmakers & experimental photographers
View Sigma fp
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?
Creative Filmmakers & Experimental Photographers — Sigma fp (2019): The smallest full-frame camera in the world — Cinema DNG RAW and L-mount flexibility in a pocket-sized body that rewards creative shooters.
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
Sigma fp (2019)
- Filmmakers who want the world's smallest full-frame camera as a B or C camera
- Experimental photographers who want to build a unique, modular setup
- L-mount photographers who want an ultra-compact full-frame body
- Anyone who wants a conversation-starting camera that delivers serious results
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 sigma fp has the highest resolution at 25mp; the a7s ii is the most affordable; only the a7s ii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Sigma fp (2019) | A7S II (2015) |
|---|---|---|
| Price | £1,499 | £799 |
| Sensor | 24.6MP full-frame Bayer CMOS | 12.1MP full-frame BSI Exmor CMOS |
| Resolution | 24.6MP | 12.1MP |
| Video | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p | 4K/30p internal (full sensor readout), 1080p/120p, S-Log2/S-Log3 |
| Autofocus | Contrast-detect AF with face/eye detection | 169 phase-detect + 25 contrast AF — limited by modern standards |
| Stabilisation | None (lens-based only) | 5-axis IBIS — 4.5 stops (first Sony mirrorless with IBIS) |
| Burst Rate | 18fps electronic | 5fps continuous |
| Battery Life | 200 shots (CIPA) | ~370 shots (CIPA) |
| Weight | 422g body only | 584g body only |
| Dimensions | 112.6 × 69.9 × 45.3mm | 126.9 × 95.7 × 60.3mm |
| Weather Sealed | No | Yes |
| Viewfinder | None | EVF, 2.36M dots, 0.71× magnification |
| Screen | 3.15" fixed touchscreen | 3.0" tilting LCD, 1.23M dots |
| Mount | Leica L-mount | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single SD UHS-II + CFexpress Type B (via adapter) | Dual SD UHS-I slots |
| Connectivity | USB-C 3.1, Wi-Fi, Bluetooth | USB Micro-B, Bluetooth (via app), Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | Sigma fp | A7S II |
|---|---|---|
| Vlogging & Video | ||
| Street | ||
| Travel | — | |
| Portrait | ||
| Landscape | — | |
| Sports & Action | — | |
| Low Light | — | |
| Wedding | — | |
| Sports | — |
More comparisons with Sigma fp
Camera family history