KFvs A7S III
Sony
A7S III (2020)
Starting from £2999 new
Best for Professional video & low-light filmmaking
View A7S III
GearScore™ Verdict — Which should you buy?
Landscape & Outdoor — KF (2022): The Pentax KF is a rare thing — a weather-sealed DSLR with in-body stabilisation and an articulating screen at an accessible price. Video is modest at 1080p/60p, but for outdoor and landscape photographers who prefer optical viewfinders and want real weather sealing, the KF delivers in a format that is increasingly hard to find.
Professional Video & Low-Light Filmmaking — A7S III (2020): If video is your primary discipline, the A7S III is the camera. 4K/120p at 10-bit in a weather-sealed body with a 9.44M dot EVF is an extraordinary package. The 12MP sensor isn't limiting for video — and it's usable at ISO 409,600 in a pinch.
Who should buy what
KF (2022)
- Outdoor and landscape photographers who want weather sealing at an accessible price
- DSLR users who want IBIS and an articulating screen without switching systems
- Pentax K-mount lens collectors who want a modern body for their glass
- Photographers who prefer the natural feel of an optical viewfinder
A7S III (2020)
- Filmmakers and videographers who need 4K/120p at 10-bit
- Event videographers who shoot in dark venues regularly
- Documentary filmmakers who need reliable AF and weather sealing
- Hybrid shooters where video is primary and stills are secondary
Quick take: The kf has the highest resolution at 24mp; the kf is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | KF (2022) | A7S III (2020) |
|---|---|---|
| Price | £700 | £2,999 |
| Sensor | 24.2MP APS-C CMOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 24.2MP | 12.1MP |
| Video | 1080p/60p | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | SAFOX 13 phase-detect AF with 11 points | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition |
| Stabilisation | In-body Shake Reduction (SR II), up to 5.5 stops | 5.5-stop IBIS |
| Burst Rate | 6fps | 10fps mechanical |
| Battery Life | ~410 shots (CIPA) | ~600 shots (CIPA) / ~70min continuous 4K recording |
| Weight | 643g (body only) | 699g (body, battery, card) |
| Dimensions | 131.0 × 101.0 × 76.0mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | Optical pentamirror, 0.95× magnification, ~100% coverage | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made |
| Screen | 3.0" fully articulating touchscreen, 1.04M dots | 3.0" vari-angle touchscreen, 1.44M dots |
| Mount | Pentax KF-mount | Sony E-mount |
| Memory Cards | Single SD UHS-I slot | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB, Wi-Fi, Bluetooth | USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth |
Suitability by genre
| Genre | KF | A7S III |
|---|---|---|
| Landscape | — | |
| Travel | ||
| Portrait | ||
| Wildlife | ||
| Casual | — | |
| Street | ||
| Vlogging & Video | — | |
| Sports & Action | — | |
| Video | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
More comparisons with KF
Camera family history