COBALT 128GB UHS-II SD Cardvs A6400
ProGrade Digital
COBALT 128GB UHS-II SD Card
Starting from £50 new
Best for Professional sports & high-speed burst photography
View COBALT 128GB UHS-II SD Card
GearScore™ Verdict — Which should you buy?
Professional Sports & High-Speed Burst Photography — COBALT 128GB UHS-II SD Card: If your camera has a UHS-II slot, the COBALT is one of the best cards to put in it. ProGrade is a brand started by former SanDisk and Lexar engineers — the quality and consistency match the pedigree. Faster file transfers and better burst clearance justify the price premium for professionals.
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
COBALT 128GB UHS-II SD Card
- Professional photographers with UHS-II capable camera bodies
- Sports and action photographers who shoot at 20fps+ and need fast buffer clearing
- Videographers recording 6K/8K or high-bitrate 4K footage
- Working photographers who can't afford to miss a shot due to buffer lag
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 cobalt 128gb uhs-ii sd card is the most affordable; only the cobalt 128gb uhs-ii sd card is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | COBALT 128GB UHS-II SD Card | A6400 (2019) |
|---|---|---|
| Price | £50 | £899 |
| Sensor | — | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | — | 24.2MP |
| Video | — | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | — | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | — | None (no IBIS) |
| Burst Rate | — | 11fps mechanical, 8fps with AF tracking |
| Battery Life | — | ~410 shots (CIPA) |
| Weight | 2g | 403g (body, battery, card) |
| Dimensions | Standard SD card size (32 × 24 × 2.1mm) | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | Yes | No |
| Viewfinder | — | EVF, 2.36M dots, 0.70× magnification |
| Screen | — | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | — | Sony E-mount |
| Memory Cards | — | Single SD UHS-I |
| Connectivity | UHS-II (V60, U3) — read up to 250MB/s, write up to 130MB/s | Micro-USB, Wi-Fi, Bluetooth, NFC |
Suitability by genre
| Genre | COBALT 128GB UHS-II SD Card | A6400 |
|---|---|---|
| Wildlife | ||
| Video | ||
| Portrait | ||
| Travel | ||
| Street | — |
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