Camera Reviews
Sony a6400 Review: Lightning-Fast Autofocus in a Compact Body
The Sony a6400 occupies an interesting place in the mirrorless camera landscape — it's small enough to carry everywhere, yet its autofocus system rivals came...
The Sony a6400 occupies an interesting place in the mirrorless camera landscape — it's small enough to carry everywhere, yet its autofocus system rivals cameras costing significantly more. We tested it shooting a wedding, studio portraits, and daily family life over two weeks to see where it shines and where it stumbles.
Key Specs
- 24.2 MP APS-C sensor
- 425 phase-detection + 425 contrast-detection AF points
- Real-time Eye AF (always active)
- 11 fps continuous shooting with AF tracking
- 4K video (no crop)
- 180° tilting touchscreen
- Weather-sealed body
- 0.02-second AF acquisition
Autofocus — The Main Event
Sony's AF system is light years ahead of most competitors. Real-time Eye AF is always active — the camera continuously locks onto eyes without you needing to press a separate button. Real-time tracking follows subjects tenaciously across the frame. For a camera at this price point, the AF performance is genuinely remarkable.
Where It Struggles
Low light: ISO above 2000 introduces noticeable noise. The dynamic range, while decent, can't match full-frame bodies. If you shoot weddings or indoor events frequently, this camera will feel limiting.
Touchscreen: Calling it a "touchscreen" is generous. Responsiveness is slow, and functionality is limited. Don't expect iPhone-level interaction.
Menu system: Sony's menu remains overwhelming. You'll need to set up the custom menu to make daily operation bearable.
No IBIS: The lack of in-body stabilization is a real drawback for video shooters and low-light stills work.
Image Quality
With fast glass, the a6400 produces excellent results. The kit lens (16-50mm f/3.5-5.6) is serviceable but limiting — invest in a prime like the Sony 35mm f/1.8 OSS or the compact FE 28mm f/2 to unlock the camera's potential. Colors are pleasing, and 24 megapixels provides ample detail for prints and cropping.
Who Should Buy It
This is an ideal travel, family, and everyday camera — small enough to throw in a bag, with autofocus that can keep up with kids and candid moments. For professional work (especially weddings or low-light events), we recommend stepping up to a full-frame Sony body.
Practical Tips
- Set up the custom My Menu immediately — it will save you hours of frustration navigating Sony's default interface.
- Invest in a fast prime lens. The body is capable of much more than the kit lens reveals.
- For video, consider a small external mic — the flip-up screen is blocked by most hot-shoe microphones without a rig.
FAQ
Q: Is the Sony a6400 good for video? It shoots excellent 4K video with no crop, but lacks in-body stabilization and a headphone jack. A gimbal or stabilized lens is recommended for handheld work.
Q: Does the a6400 have weather sealing? Yes — it's weather-sealed against dust and moisture, though not fully waterproof.
Q: What lenses should I buy with the Sony a6400? The Sony 35mm f/1.8 OSS is a great all-around prime. For travel, the compact FE 28mm f/2 is an excellent pairing.