77mm Variable ND2-400 Filtervs A6400
K&F Concept
77mm Variable ND2-400 Filter
Starting from £45 new
Best for Video exposure control & daytime long exposures
View 77mm Variable ND2-400 Filter
GearScore™ Verdict — Which should you buy?
Video Exposure Control & Daytime Long Exposures — 77mm Variable ND2-400 Filter: One filter instead of three. At 77mm it works on most standard zoom lenses. There's some colour cast and cross-pattern at extreme settings — step up to the Hoya or Breakthrough options if you need perfection, but for most uses this delivers excellent results at a fair price.
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
77mm Variable ND2-400 Filter
- Videographers who need to control shutter speed in bright daylight
- Photographers who want to shoot long exposures without swapping fixed ND filters
- Portrait photographers who want shallow depth of field in bright outdoor light
- Anyone who wants one filter to cover all ND situations
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 77mm variable nd2-400 filter is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | 77mm Variable ND2-400 Filter | A6400 (2019) |
|---|---|---|
| Price | £45 | £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 | 65g | 403g (body, battery, card) |
| Dimensions | 77mm thread × 8mm depth | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | No | No |
| Viewfinder | — | EVF, 2.36M dots, 0.70× magnification |
| Screen | — | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | 77mm filter thread | Sony E-mount |
| Memory Cards | — | Single SD UHS-I |
| Connectivity | — | Micro-USB, Wi-Fi, Bluetooth, NFC |
Suitability by genre
| Genre | 77mm Variable ND2-400 Filter | A6400 |
|---|---|---|
| Video | ||
| Street | ||
| Portrait | ||
| Wildlife | ||
| Travel | — |
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