Sigma fpvs A7 IV
Sigma
Sigma fp (2019)
Starting from £1499 new
Best for Creative filmmakers & experimental photographers
View Sigma fp
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.
Portrait & Wedding Photography — A7 IV (2021): The full-frame portrait benchmark — 33MP, AI Eye AF, and exceptional skin-tone rendering in a pro-grade hybrid body.
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
A7 IV (2021)
- Working photographers who want a reliable full-frame all-rounder
- Portrait, wedding, and event photographers needing 33MP and fast AF
- A7 III owners ready for a major upgrade in resolution, AF, and video
- Hybrid shooters who want 4K/60p and 33MP stills in one dependable body
Quick take: The a7 iv has the highest resolution at 33mp; the sigma fp is the most affordable; only the a7 iv is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Sigma fp (2019) | A7 IV (2021) |
|---|---|---|
| Price | £1,499 | £2,299 |
| Sensor | 24.6MP full-frame Bayer CMOS | 33MP Full-frame BSI Exmor R CMOS |
| Resolution | 24.6MP | 33.0MP |
| Video | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p | 4K/60p oversampled, 10-bit internal, S-Log3, S-Cinetone |
| Autofocus | Contrast-detect AF with face/eye detection | 759-point phase-detect, AI subject recognition |
| Stabilisation | None (lens-based only) | 5-axis IBIS, 5.5 stops |
| Burst Rate | 18fps electronic | 10fps mechanical, 30fps electronic |
| Battery Life | 200 shots (CIPA) | ~580 shots (CIPA) |
| Weight | 422g body only | 659g body only |
| Dimensions | 112.6 × 69.9 × 45.3mm | 131.3 × 96.4 × 79.8mm |
| Weather Sealed | No | Yes |
| Viewfinder | None | EVF, 3.69M dots, 0.78× magnification |
| Screen | 3.15" fixed touchscreen | 3.0" vari-angle touchscreen |
| Mount | Leica L-mount | Sony FE (full-frame E-mount) |
| Memory Cards | Single SD UHS-II + CFexpress Type B (via adapter) | Dual slots: CFexpress Type A + SD UHS-II |
| Connectivity | USB-C 3.1, Wi-Fi, Bluetooth | USB-C (3.2 Gen 2), Bluetooth, Wi-Fi |
Suitability by genre
| Genre | Sigma fp | A7 IV |
|---|---|---|
| Vlogging & Video | ||
| Street | — | |
| Travel | — | |
| Portrait | — | |
| Landscape | ||
| Sports & Action | ||
| Studio Portraits | — | |
| Outdoor Portraits | — | |
| Wedding & Events | — |
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