KFvs 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?
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.
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
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 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 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 II (2015) |
|---|---|---|
| Price | £700 | £799 |
| Sensor | 24.2MP APS-C CMOS | 12.1MP full-frame BSI Exmor CMOS |
| Resolution | 24.2MP | 12.1MP |
| Video | 1080p/60p | 4K/30p internal (full sensor readout), 1080p/120p, S-Log2/S-Log3 |
| Autofocus | SAFOX 13 phase-detect AF with 11 points | 169 phase-detect + 25 contrast AF — limited by modern standards |
| Stabilisation | In-body Shake Reduction (SR II), up to 5.5 stops | 5-axis IBIS — 4.5 stops (first Sony mirrorless with IBIS) |
| Burst Rate | 6fps | 5fps continuous |
| Battery Life | ~410 shots (CIPA) | ~370 shots (CIPA) |
| Weight | 643g (body only) | 584g body only |
| Dimensions | 131.0 × 101.0 × 76.0mm | 126.9 × 95.7 × 60.3mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | Optical pentamirror, 0.95× magnification, ~100% coverage | EVF, 2.36M dots, 0.71× magnification |
| Screen | 3.0" fully articulating touchscreen, 1.04M dots | 3.0" tilting LCD, 1.23M dots |
| Mount | Pentax KF-mount | Sony FE mount (full-frame E-mount) |
| Memory Cards | Single SD UHS-I slot | Dual SD UHS-I slots |
| Connectivity | USB, Wi-Fi, Bluetooth | USB Micro-B, Bluetooth (via app), Wi-Fi, 3.5mm mic jack |
Suitability by genre
| Genre | KF | A7S II |
|---|---|---|
| Landscape | — | |
| Travel | — | |
| Portrait | ||
| Wildlife | — | |
| Casual | — | |
| Street | ||
| Vlogging & Video | ||
| Sports & Action | — | |
| Low Light | — | |
| Wedding | — | |
| Sports | — |
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