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  • Davide DB
    Davide DB

    By Davide DB •

    Sony Alpha9 III - World’s First Global Shutter Full-Frame Camera

    sonya9iii-02.webp.49f4b702bc4a5d94ca29076170604750.webp

    (image credits: Sony)

    Sony has unveiled the Sony A9 III, a full-frame mirrorless camera boasting a 24.6MP resolution and a global shutter. The global shutter functionality ensures simultaneous readout of information from each pixel on the sensor, eliminating distortion in both still images and videos of moving subjects.

    Employing a stacked design, the 24.6MP CMOS sensor, in conjunction with the latest Bionz XR processor, guarantees swift operational performance. The Sony A9 III, also recognized as the Sony Alpha 9 III, achieves continuous shooting at an impressive 120fps, devoid of blackout, with a maximum shutter speed of 1/16,000 sec. In single-shot mode, the maximum shutter speed reaches an unprecedented 1/80,000 sec.

    Introducing a Pre-Capture function, the Sony A9 III allows the camera to capture up to 1 second of images at 120fps when the shutter release is half-pressed. These images are saved to the memory card upon full depression of the shutter, enabling continuous shooting.

    sonya9iii-03.webp.387fd2666715e37f88f7417b2bc23cb3.webp

    (image credits: Sony)

    Furthermore, the camera supports shooting with a compatible Sony flash at any shutter speed, eliminating the need for a high-speed sync (HSS) mode and enabling flash use even in bright sunlight with a wide aperture.

    To address diverse shooting scenarios, the A9 III features a speed-boost option assignable to a button. This allows for a quick transition from a slower shooting rate, such as 20fps, to 120fps.

    Sony asserts that the A9 III incorporates its most advanced autofocus system, featuring 759 phase-detection AF points covering 95.6% of the frame with precision down to -5.0EV. Equipped with an AI processing unit, the camera ensures rapid and accurate subject recognition, supporting Real-time Subject Recognition AF and Real-Time Tracking even at the high frame rate of 120fps.

    Additionally, the A9 III boasts a 5-axis 8-stop image stabilization system. The global shutter contributes to distortion-free video, allowing the camera to shoot in 4K at 60p with 6K oversampling. Notably, it is Sony's inaugural Alpha camera offering 4K 120p video without cropping, complemented by 10-bit 4:2:2 color, S-Cinetone, and S-Log 3 modes.

    The rear of the A9 III features a 3.2-inch 4-axis multi-angle LCD with 2,095,000 dots, accompanied by a 9.44-million-dot OLED electronic viewfinder boasting a 120fps refresh rate at the highest image quality, extendable to 240fps with a slight reduction in resolution.

    Priced at $5999 / £6,100 / €7,000, the Sony A9 III is slated for release in spring 2024.

     

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    Buddha

    I saw the release of this camera. It’s definitely a major jump in technology for sensors and shutter speed but I don’t see anything that would be beneficial for UW photography at this point. I think as versions progress and the trickle down of the global shutter and possible collateral tech might be something of interest. 

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    Davide DB

    Yes, major tech jump but no advantages for uw shooters and reading some review, the sensor is noisier.

    Moreover, digging through the lines of Sony leaflet, I found:

    Sync speed with "External" flash is 1/500. With base ISO of 250, its the same as 1/200 with ISO 100.

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    fruehaufsteher2

    What makes the Camera so special is the ability of capturing very fast action. In my opinion the A9 III could be a huge improvement for high speed sports, birds in flight or other fast moving subjects.

    But below the surface there's hardly any subject that cannot be caught with the A7R V - and here you have much more potential when cropping. While the specs look extremely interesting it might not be the best choice under water.

    DSC06678.jpeg

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    Davide DB
    6 hours ago, Alex_Mustard said:

    The camera doesn’t have an internal flash. All the material I have seen says that it synchronises with any flash at any shutter speed. 

    Yes my bad it was inside a Dpreview article at launch and then removed.

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    Phil Rudin

    Not real keen about the native base ISO of 250 (expandable to 125) considering with Z8 you get 64 and 32 and with A7R V 100 and 50 ISO. 

    The ability to shoot HSS with all strobes is an advantage but most UW flashes don't flash at speeds reaching anywhere near say 1/10,000th sec. 

    I am sure that global shutter will be the way of the new world as manufactures move away from mechanical shutter to all electronic otherwise we will be stuck in the rut of 1/200th sync speeds on full frame which can not be corrected with HSS strobes. 

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