Sony Alpha A9: The Ultimate Camera for Professional Photographers

Discover the innovative features of the Sony Alpha A9, the flagship camera designed for professional photographers. With its advanced technology, the Sony Alpha A9 delivers high-quality results that compete with traditional DSLR cameras.

Written by Victor Chan | Updated: Mon May 01 2023

Sony Alpha A9 article cover photo

Key Features

Apr 19 2017


24 megapixels


Sensor TypeFull frame
SensorStacked BSI-CMOS

Other similar cameras

Sony Alpha A9 II thumbnail

Sony Alpha A9 II

Released Oct 03 2019 | 24MP resolution

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Sony Alpha A7 III

Released Feb 27 2018 | 24MP resolution

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Overview of the Alpha A9

The Sony Alpha A9 is a game-changer in the world of photography. This camera is designed to meet the needs of the most demanding professional photographers. Its advanced autofocus system, high-speed shooting, and unparalleled image quality make it an ideal choice for capturing both stills and videos. If you are looking for a camera that can deliver stunning results even in challenging conditions, then the Sony Alpha A9 is definitely worth considering. In this blog post, we will take a closer look at the features that make this camera stand out. We will also explore some of the key benefits of using the Sony Alpha A9 for your photography needs. So, let's get started!

The Sony Alpha Series Lineup

Sony Alpha A9 thumbnail

Sony Alpha A9

Released Apr 19 2017 | 24MP resolution

Sony Alpha A9 II thumbnail

Sony Alpha A9 II

Released Oct 03 2019 | 24MP resolution

Sony Alpha A9 Pros and Cons

Now, we will look more closely at our review of the Sony Alpha A9 camera. We will see what it can do and compare it to other cameras like it. We will tell you what's good about it and what's not so good. This way, you'll know if it's the camera for you!


Sony Alpha A9 has a 24.2MP full-frame CMOS sensor for high-quality images.
It has a fast autofocus system with 693 phase-detection points for accurate tracking.
The camera can shoot up to 20 frames per second, making it ideal for sports and action photography.
It features 4K UHD video recording with high-quality image stabilization that keeps your footage stable.
Sony Alpha A9 has a built-in Wi-Fi for easy file sharing and remote control through your smartphone.
The camera has a durable weather-sealed body that can withstand harsh weather conditions.


Sony Alpha A9 is expensive, making it less accessible for budget-conscious photographers.
The battery life of the camera is below average, which means you have to carry extra batteries.
It lacks an optical low-pass filter, which may result in some moiré patterns in your images.
The camera does not have a built-in flash, so you may need an external flash for low-light situations.
It has a limited selection of lenses compared to other camera brands.
Although the camera does offer 4K UHD video recording, it may not have the same level of video features as dedicated video cameras.

Build and Construction

Body and dimensions

Sony Alpha A9

Weather sealed
Dimensions127 x 96 x 63mm

Weather Sealing

The Sony Alpha A9 camera is equipped with environmental seals that make it resistant to weather, preventing water and dust from entering the camera. If you enjoy outdoor photography and need a camera that can handle extreme conditions, the Alpha A9 is an excellent choice.

Design and Handling

Main design features

View FinderElectronic
Screen TypeTilting
Screen Resolution1,440k dots
Body typeSLR-style mirrorless

Suitable for:

PhotographyAbove Avg.
VideographyAbove Avg.
TravelAbove Avg.

LCD Screen

This camera has a tilting 3.00" screen, with a display resolution of 1,440k dots. This makes the Sony Alpha A9 not as suitable for those looking for a vlogging camera as you cannot view yourself while shooting selfies easily. The camera also features a touch screen, which adds to its ease of use.


Alpha A9 includes a electronic viewfinder with 3,686k dots of resolution with a coverage of 100% and a magnification of 0.78x. This feature enhances the camera's suitability for outdoor photography in bright conditions.

Image Quality

Sony Alpha A9 has a 24MP sized Stacked BSI-CMOS sensor. You can shoot at maximum resolution of 24 pixels. Sony Alpha A9 has a native ISO range of 100 - 51200 which can be boosted to 50 - 204800. It can also save files in RAW format which gives you a wider room for post processing.

Key Features

Apr 19 2017


100 - 51200

ISO Range

SensorFull frame
Extended ISO50 - 204800
Max resolution6000 x 4000 pixels

DXO Sensor Scores


92 / 102

Color Depth

24.9 / 26.5

Dynamic Range

13.3 / 14.8

Low Light ISO

3517 / 4505

DXO mark sensor scores

The DXOmark rankings indicate that the Sony Alpha A9 camera has excellent color depth performance, which refers to the number of colors the sensor can distinguish. Additionally, its dynamic range is also above average, allowing it to retain medium amounts of details in both bright and dark areas of a scene. The camera's low light ISO performance is average, which is an important factor to consider if you plan to use it in dimly lit indoor environments or at night. Overall the image quality of the Alpha A9 is excellent

Crop Factor

Camera crop factor (or focal length multiplier) refers to how a camera's sensor size affects the apparent field of view of a lens. Crop factor is determined by comparing the size of a camera's sensor to that of a full-frame sensor, which is a standard reference size for camera sensors.

Size comparison

Medium FormatFull FrameAPS-C (Sony, Nikon)

Crop factor calculator

Crop factor


Full frame equivalent


This camera: Full frame



Connectivity, storage, battery

StorageDual SD/SDHC/SDXC slots (UHS-II compatible)
Battery Life650 shots
Battery ModelNP-FZ100
Wireless Connectivity


The Sony Alpha A9 supports Dual SD/SDHC/SDXC slots (UHS-II compatible) with 2 slots for storage. Having dual SD card slots on the Sony Alpha A9 is highly advantageous as it mitigates the risk of losing footage due to memory card malfunctions. This feature is particularly beneficial for wedding photography and other professional settings.


The Sony Alpha A9 uses the NP-FZ100 model of battery pack. This is rated for 650 shots shots which is high. If you intend to take photos or record videos for an extended period, it might be a good idea to bring along additional batteries.

Photography Features


The Sony Alpha A9 does not have a built-in flash, but it does offer a flash shoe that allows you to attach external flashes. This provides more versatility in your lighting choices.


The Sony Alpha A9 boasts a maximum mechanical shutter speed of 1/8000s, which is ideal for shooting fast-moving subjects in bright environments, such as in sports photography. Faster shutter speeds enable you to freeze the action and capture every detail, making it easier to get the perfect shot.

With a continuous mechanical shutter speed of n/a or an electronic shutter speed of n/a, this camera is not capable of capturing the perfect moment more easily, making it not as suited for wedding, sports, and wildlife photography. Higher shutter speeds make it easier to capture fast-paced action, ensuring that you never miss the perfect shot.


The Sony Alpha A9 includes two autofocus (AF) systems: contrast detection and phase detection, with 693 number of focus points.

While contrast detection is generally more accurate and precise, phase detection autofocus is faster and more effective in most situations, particularly when photographing moving subjects.

Phase detection autofocus works by dividing the incoming light into pairs and then analyzing how they intersect on the camera's sensor. This method allows the camera to determine not only if a subject is in focus but also the direction and distance needed to adjust the focus to achieve perfect sharpness.

On the other hand, contrast detection autofocus works by analyzing the contrast of an image and adjusting the focus until the highest contrast is detected. While this method is very accurate, it can be slow, especially in low light conditions or when photographing moving subjects.

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What is the sensor size of the Sony Alpha A9?

The Sony Alpha A9 features a Stacked BSI-CMOS sensor

Is the Sony Alpha A9 weather sealed?

Yes the Alpha A9 does have weather sealing.

When was the Sony Alpha A9 announced?

The Sony Alpha A9 was announced on Apr 19 2017

Does the Sony Alpha A9 have in-body image stabilization?

Yes the Alpha A9 does have in-body image stabilization that can compensate for camera shake, making it easier to shoot handheld in low light conditions.

What is the ISO range of the Sony Alpha A9?

The Alpha A9 has a native ISO range of 100-51200, which can be expanded to ISO 50-204800 for even greater sensitivity in low light conditions.

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