Lucy Eva
CEO and Founder

Lucy Eva is a content writer in Paylessdeal for 4 years, and a part-time contributor focused on the news and features attached to technology. She is always being excited about technology, especially about smartphones.

March 19, 2019

Sony A6400 Review – Exceptional Image Quality and Up to Snuff Performance at Unmatched Rates

The latest and coolest Sony A6400 is a mirror-free medium-range camera which comes with a 4k video, 24-megapixel APS-C sensor, and a powerful autofocus tracking device, an integrated viewfinder and a 180-degree tactile screen. Officially released back in February 2019 and it’s a successor of Sony’s A6300 but it’s quite pricier as compared to Sony A6500 – depends on your needs. The A6400 is basically the same body with the same viewfinder, controls, battery, and slot and shutter mechanism as the A6300. Not only Sony A6400 comes with an impressive amount of specifications – but it also delivers where it matters, with exquisite quality images and videos.

Key Features

  • 24.2MP APS-C Format Sensor
  • Real-Time Eye AF
  • 425 Phase Detection Autofocus Points and 425 Contrast Detection AF Points
  • 11 Frames per Second Continuous Shooting with Continuous AF/AE 8fms in Silent Mode
  • 0.3-inches OLED Screen with 2359296 Dots Viewfinder
  • In-Body Intervalometer
  • S-Log3 and S-Log2 Gamma
  • 4K HDR (HLG) Recording, 30fos – 8-bit
  • 108-Degree Tilting Touchscreen
  • ISO 100-32000 Expandable to 102400


Autofocusing is one of the most exciting developments. A total of 850 AF points, 425 using phase detection and 425 using contrast detection is available. It is said that these are closely packed and 84% of the image area is covered. This dense coverage contributes to the identification and follows up of the A6400. According to Sony, a camera can be focused within only 0.02seconds with the new generation BIONZ X image processing engine.

In addition, the newest version of Sony's excellent Eye AF system, Real Time Eye AF, is also available. This places the eyes automatically in real time to sharpen them. You can even choose to concentrate on the right or the left eye. Real-time tracking also helps to understand subjects using artificial intelligence (AI). Together, they should allow the photographer to concentrate on the right composition quickly and accurately in a wide range of situations. Sony is also excited about adding support for Animal Eye AF in summer 2019 with a firmware upgrade. It's great news especially for wildlife photographers and pet owners.

Continuous Shooting

Very much like Sony A6300, Sony A6400 is capable enough to shoot at up to 11 frames per second. The A6400 can shoot up to 99 Extra Fine Jpegs or 46 raw files, however, there is a great bounce in the burst depth. This is a good comparison of the A6300's 44 Extra Fine Jpegs or 21 raw files. Well, when recording raw files and Jpegs simultaneously, both cameras can shoot up to 21 images. The maximum rate is 8fps in case want to shoot silently. For a camera at that level, that's quite a pace. Seeing an intervalometer built-in is also great. This lets you set an interval of up to 9,999 shots between 1 and 60 seconds. Then images can be made into a time-lapse movie on a Sony's Viewer Software.

Build and Handling

The A6400 has a magnesium alloy design, according to Sony, and is resistant to dust and moisture. The shutter is rated at 200,000 cycles, in the meantime. Sony seems to be stuck with a rectangular - rangefinder-like design of Sony A6300 for its A6400. That obviously means a viewfinder is over in a top-left corner. We think that this design is less natural than DSLR, but it makes it easier for right-eyed photographers to see with their left eyes around the camera. The missing design does not reach the camera's forehead and the Alpha 6300 has a good grip. You can shoot yourself fairly easily with a light optic like the 16-50 mm kit lens mounted.


There is a joystick to set the autofocus point on the back of the camera, almost all the important controls are provided and are readily accessible. The fastest way to set the AF point is with the touchscreen, in the absence of a joystick. The Sony Alpha A6400 controls also have many opportunities to be adopted. For instance, to change several settings quickly, you can save up to three sets of custom settings. The rear and top command dials can also be customized if you press a custom button

In addition, the Function (FN) menu can be set to your own preferences with seven individual buttons. We consider this standard arrangement fairly good, but it can be changed from the settings after a while so that you can get Silent shutter and Aspect controls faster. There is also a section called My Menu which can be adapted to allow you to reach the features you use more often.


The A6400's 3-inch 921,600-dot display is indeed good news. First of all, it's sensitive to touch and as usual, you cannot use touch control with Sony to navigate the menu and select settings. But there are TouchPad, Touch Focus, Touch Shutter, and new options for touch tracking. The TouchPad allows you to set the AF point on your screen while looking in the visitor. The latter activates' Real Time Tracking.

Further good news is that the display can be inclined vertically to 180 degrees, to make it visible from the front. It's good for selfies and vloggers who want to see themselves in front of the camera. The bad news is that Sony's 16:9 looks ratio of the A6400 remains unchanged for still photographers. It's great in the video, but it makes 3:2 native pictures look a little small.


The Sony Alpha A6400 has the same electronic viewfinder (EVF) of 0.39-inch type 2.36 million dots as the A6300 and A6500. This increases by 0.7, and you can boost the frame rate from 60fps to 120fps if you rummage through the menu. The latter provides a smoother panorama but eats battery power a little faster than standard. In either mode, the EVF offers a pleasant, clear and detailed view. But in the default settings, it's a bit too bright. Therefore, reducing your brightness through the menu is a good idea. There is a risk of unnecessary exposure reduction in default settings.


Due to the specification of the impressive camera, Sony did not just gain ground on the camera market. They offer the photographers the image quality they want. There are only a few images that are slightly underexposed from the Sony Alpha A6400 because the viewer looks a bit bright, but the majority are good. It produces quite dynamic colors for most people in default settings. Something that should be noted, you must avoid the silent shooting mode, otherwise, your subject will likely suffer from the rolling shutter effect, if you wish to capture fast movement in the frame or if you are planning.

Real-Time Eye AF and Real-Time Tracking

A major bonus for a wedding and social photographers has been proved by the Sony AF system Eyes. The A6400 tends to be aimed at families and friends but works extremely well. You will find that when they are about the size they are only seen in the viewer, it spots and concentrates on the eyes of a topic. We mean around the point where the eyeballs can be differentiated from the eyebrows. And staying with them does a great job. Likewise, a real-time tracking which uses Ai - makes keeping a subject sharp with ease.

According to Sony, AF-S's low-light capacity is better than its low-light system and can be used in AF-S mode at -2Ev. AF-C (Standard AF) mode presumably requires a little more light. And the A6400's AF system was only really deceptive in low light. It's a bit more struggling than you would want. The subject often gets sharp if you find a high-contrast edge, but it slows down and hunts for something.

Image Quality

The Sony A6400 captures a lot of detail at the low end of the sensitivity range. Pictures look nice and crisp, and everything looks quite natural even at 100 percent on the screen. As expected, noise penetrates the equation with increased sensitivity. Jpeg images can look a bit confusing in certain areas under the dull conditions which require an ISO 16,000 or 32,000 setting (native maximum). In these configurations, the raw files are processed more carefully to find the correct balance between the visibility of noise and deletion. Good results are possible, but as a rule, we would remain within the range of native sensitivities (ISO 100-32000).

Pricing and Availability

Sony A6400 officially started hitting shelves somewhere back in February 2019 which means it’s available all over Australia and one can get their hands on one with immediate effects. Price-wise, Sony A6400 set users back AU$1499 in Australia and AU$1699 if someone goes for a kit which includes a 16-50mm F3.5-5.6 lens.


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