HD D FA 24-70mm f/2.8 ED SDM WRvs A6400
Pentax
HD D FA 24-70mm f/2.8 ED SDM WR (2015)
Starting from £999 new
Best for Wedding, events & documentary photography
View HD D FA 24-70mm f/2.8 ED SDM WR
GearScore™ Verdict — Which should you buy?
Wedding, Events & Documentary Photography — HD D FA 24-70mm f/2.8 ED SDM WR (2015): The professional zoom for Pentax DSLR shooters — weather-sealed to the same standard as the K-3 Mark III, with a constant f/2.8 across the full range.
Content Creation & Vlogging — A6400 (2019): The best value APS-C Sony you can buy — especially used. Real-time Eye AF at this price point was transformative when it launched and still makes it one of the most reliable autofocus systems in the lineup.
Who should buy what
A6400 (2019)
- Vloggers and content creators who need a flip screen and reliable AF
- Photographers upgrading from a compact or smartphone
- Beginners who want room to grow into a full E-mount lens ecosystem
- Anyone prioritising autofocus performance at an accessible price
Quick take: The a6400 is the most affordable; only the hd d fa 24-70mm f/2.8 ed sdm wr is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | HD D FA 24-70mm f/2.8 ED SDM WR (2015) | A6400 (2019) |
|---|---|---|
| Price | £999 | £899 |
| Sensor | f/2.8 (constant max aperture) | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | — | 24.2MP |
| Video | 38cm minimum focus distance | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | SDM (Supersonic Drive Motor) — fast and quiet | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | None (relies on body SR/IBIS) | None (no IBIS) |
| Burst Rate | N/A | 11fps mechanical, 8fps with AF tracking |
| Battery Life | N/A | ~410 shots (CIPA) |
| Weight | 985g | 403g (body, battery, card) |
| Dimensions | 92mm diameter × 133mm length | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | Yes | No |
| Viewfinder | N/A | EVF, 2.36M dots, 0.70× magnification |
| Screen | N/A | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Pentax KF-mount | Sony E-mount |
| Memory Cards | N/A | Single SD UHS-I |
| Connectivity | N/A | Micro-USB, Wi-Fi, Bluetooth, NFC |
Suitability by genre
| Genre | HD D FA 24-70mm f/2.8 ED SDM WR | A6400 |
|---|---|---|
| Wedding & Events | — | |
| Landscape | — | |
| Portrait | ||
| Video | — | |
| Street | — | |
| Travel | — | |
| Wildlife | — |
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