Sony Alpha A9 Detailed Review

See all images of the Sony Alpha A9


In additional Alpha A9 was introduced by Sony in May 2017. It belongs to the Mirrorless Cameras category.

Sony is well-known and shouldn’t require further introduction, please see our manufacturer’s page for more digital cameras by Sony.

Brand Sony
Category Mirrorless
Date 05/2017
Sensor Properties

Also Alpha A9 has a Full frame CMOS sensor with size of 36 x 24 mm² (1.40″ x 0.94″).

Picture of Alpha A9’s sensor compared to popular format.

Infographic: Alpha A9 comparing sensor sizes

The 1-Euro coin has a diameter of 23.25mm.

The Alpha A9’s sensor has resolution of 24 megapixel.

The Sony supports taking images in RAW. RAW images are stored as they come from the sensor, without any in-camera processing or sharpening. Converting to JPEG or other formats takes place on the computer, using software like Adobe Lightroom or Sony’s RAW converter. This involves one extra processing step but almost always results in superior image quality. Some filters, like converting to monochrome (black and white) will only yield decent results when used with RAW images.

The Alpha A9 features a mechanism for automatic sensor cleaning.

Format Full frame
Sensor area 35.60 x 23.80mm²
(1.40″ x 0.94″)
Resolution (physical) 28.30 megapixel
Resolution (effective) 24.20 megapixel
Pixel size 35.20 µm²
Sensor cleaning
RAW support
Continuous 20 frames/second
Interchangeable lens
Mount Sony E Mount
Viewfinder Properties

The Alpha A9 uses an electronic viewfinder with a resolution of 3.68 megapixel, an excellent value for a viewfinder like this which makes the camera a joy to use.

The magnifcation is c. 0.78x, an excellent value for an electronic viewfinder.

Type Elektronic
Coverage 100%
Magnification 0.78x
Resolution 3.68 megapixel
Dioptric correction

The Alpha A9’s shutter speed varies from 1/8000s to 30s.

Max. shutter speed 1/8000s
Min. shutter speed 30s
Sensitivity Properties

The Alpha A9’s sensitivity is from 100 ISO and 51200 ISO.

Also, Sony’s sensitivity can be boosted to 204800. Therefore, ISO boosting will lead to growth noise.

Min. sensitivity 100 ISO
Max. sensitivity 51200 ISO
Boost 204800 ISO
Exposure Modes

The Alpha A9 supports all general exposure modes.

The Sony allows spot exposure for the difficult occasion.

Center weight
Auto Focus Properties

The Alpha A9’s auto focus processor uses 693 AF points (or sensors). A basic rule of thumb says that the more AF points you have, the better. More AF points mean a better chance to have a point at the location of interest in a scene, a big plus in challenging situations (e.g. when panning the camera).

Manual focus is also possible with the Sony, a plus in tricky situations or for some creative freedom.

Type Hybrid
AF points 693
Manual focusing
Flash Specs

The Alpha A9 doesn’t feature a built-in flash. That is not unsusual in this camera category.

A flash or a trigger for remote flashes can be attached to the Sony’s hotshoe.

Hot shoe
Display Specs

The Alpha A9 features a monitor with a diagonal of 75.00mm (3.0 in.) and a resolution of c. 1.44 megapixel. A resonable value that will make it easy to evaluate images directly in-camera.

The camera’s display is articulated, a plus for selfies and other challenging situations.

The Alpha A9’s monitor can work as a touch screen, just like a smartphone. That can be very useful, for example to pick AF points, but keep in mind that touch screens usually don’t work when wearing gloves.

Display characteristics at a glance:

Type LCD
Size 75.00mm (diagonal)
(3.0 in.)
Resolution 1.44 megapixel
Touch screen
Video Specs

Alpha A9 video supported the resolution with 3840 x 2160 pixel.

Also the camera is equipped with an external microphone.

Sony Alpha A9 Video parameters:

Max. resolution 3840 x 2160 pixel
…with frame rates 24 frames/second
30 frames/second
External microphone
Connectivity & Wireless Specs

The Alpha A9 has Wifi connectivity already built-in. Use Wifi to transfer images to a smartphone or computer and to remote control the camera. With NFC, camera and smartphone can be paired without the need for passwords.

For photo transferring users may use Bluetooth option.

Eventually, if the wifi connection is disabled the wired connection may be used.

Connect the Sony to a monitor or TV set over HDMI.

The Sony supports USB 2.0.

Connection parameters:

Remote (wired)
Remote (infrared)
HDMI (standard)
HDMI (mini)
HDMI (micro)
USB 2.0
USB 3.0
USB Micro
USB Mini

The camera will accept all common SD HC and SD XC cards. Sony MemorySticks can be used, too.

Memory cards characteristics:

Slots 2
Memory cards SD
Micro SD
Memory Stick Pro Duo
Memory Stick Micro

The Sony Alpha A9 has a NP-FZ100 LiIon battery. The battery provides a shooting life of 650 shots. It`s enough for one day or more.

The battery can be charged over USB while in camera. Very useful, especially on vacation when most people bring a USB charger for their smartphone anyway.

The Alpha A9’s battery battery parameters:

Type NP-FZ100 LiIon
In-camera charging
Battery life 650 photos

The Sony Alpha A9’s size is 126.9 x 95.6 x 63mm³. (5.0″ x 3.8″ x 2.5″). That dimensions are without lens. The weight of camera is 5.0″ x 3.8″ x 2.5″ grams (673 oz.) without lens weight.

Here is front and top view of the Alpha A9:

Dimensions Comparison

For a better idea of the size of the camera, takes a look off camera and ID card comparison image.

Camera stats and visual info © 2019 All rights reserved.

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