The Sony a9 II takes the impressive feature set of its predecessor and adds enhanced connectivity, a refined body design, and even quicker performance. Utilizing the proven 24.2MP full-frame Exmor RS BSI stacked CMOS sensor and an updated BIONZ X processor, the a9 II sports especially quick and responsive capabilities. Up to 20 fps shooting is possible with a silent electronic shutter or up to 10 fps with a mechanical shutter is supported, along with a wide sensitivity range that reaches up to an expanded ISO 204800. The BIONZ X also performs up to 60 AF/AE functions per second to go along with the 20 fps shooting for reliable results in quickly changing situations. In addition to stills, UHD 4K video recording is supported at up to 30 fps and Quick and Slow Motion recording is also available. The BIONZ X also performs up to 60 AF/AE functions per second to go along with the 20 fps shooting for reliable results in quickly changing situations. In addition to stills, UHD 4K video recording is supported at up to 30 fps and Quick and Slow Motion recording is also available. A 3.69m-dot OLED EVF provides a bright, clear eye-level viewing means and affords blackout-free viewing to support photographing at high continuous speeds.

The rear 3.0" 1.44m-dot tilting LCD has a touchscreen design, too, for intuitive control over shooting settings and playback. Dual UHS-II SD memory card slots permit flexible file storage and the a9 II has been fitted with an improved 1000BASE-T Ethernet port for faster wired LAN sharing and remote camera operation. 5.0 GHz wireless sharing and Bluetooth are integrated, as well, for wireless sharing and remote camera control. Built for speed, the a9 II utilizes a 24.2MP Exmor RS BSI stacked CMOS sensor, along with an updated BIONZ X image processor, that yields impressively quick and responsive performance. Up to 20 fps continuous shooting is possible using an electronic shutter or 10 fps shooting is supported with a mechanical shutter. Benefitting the fast recording capabilities is an equally quick AF/AE metering system that functions 60 times per second to continuously evaluate the scene in order to lock onto and track moving subjects. Automatic anti-flicker shooting also recognizes and times the shutter action to minimize the flicker effect for more consistent results on still images. Covering 93% of the image area, a Fast Hybrid AF system incorporates 693 phase-detection points along with 425 contrast-detection areas for quick and precise focusing in a variety of lighting conditions with sensitivity down to -3 EV. The density of focusing points from this hybrid AF system also enables High-density Tracking AF Technology, which is adept at tracking moving subjects in a variety of lighting conditions. 

The apt focus system also lends itself to a variety of focusing functions for refined accuracy, including Lock-on AF, which maintains focus on moving subjects throughout the use of a configurable frame that is set over the desired moving subject, and Expand Flexible Spot, which employs neighboring focus points to retain focus on moving subjects even if the originally selected point loses focus. The focus frame color is selectable, between white and red, and AF tracking is possible with apertures narrower than f/16 with select lenses when working in Focus Priority mode. The rear touchscreen can also be used for Touch Focus control, and a Touchpad Focus Control mode lets you use the rear screen intuitively while keeping your eye on the viewfinder. Additionally, when working in AF-C mode, the focus point can be moved while the shutter button is half-pressed, making it easier to quickly shift focus without losing sight of the action. In addition to the EVF, a 3.0" 1.44m-dot rear LCD is also available, which has a touch panel design for intuitive operation and focusing control. The screen also tilts upward and downward to benefit from working from high and low angles. Built-in Wi-Fi enables the a9 II to instantly share imagery to mobile devices for direct sharing online, and support for both 2.4 and 5.0 GHz bands also enables wireless tethered shooting support. The Integrated Ethernet port has been upgraded to 1000BASE-T speed for quick wired LAN sharing and remote operation. 

Internal recording of UHD 4K movies is possible in multiple frame rates up to 30 fps and, based on the Super35mm recording area and effective 6K resolution, oversampling renders greater detail and full pixel readout is possible, that is void of pixel binning, for higher quality imagery with reduced moiré and aliasing. Full-frame 4K recording has also been dramatically improved for improved quality when working at mid to high sensitivities to permit full use of the entire sensor width. This allows users to confidently use any lens, even adapted lenses, for critical imaging without encountering blur from camera shake. A customizable Fn button can be set to handle separate tasks depending on whether it works in stills or video modes.