The Sony Alpha a99 II uses a full-frame 42.4MP Exmor R back-illuminated CMOS sensor. Its wide standard ISO range 100-25600 is expandable to even wider ISO 50-102400 when shooting still images. The a99 II also features a BIONZ X image processing engine with front-end LSI to boost image data handling.
Bottom line: It’s an A-Mount DSLR that can record UHD 4K video.
a99 II Features:
42MP Full-Frame Exmor R BSI CMOS Sensor
BIONZ X Image Processor & Front-End LSI
0.5" 2.36M-Dot XGA OLED Tru-Finder EVF
Internal UHD 4K Video & S-Log3 Gamma
Hybrid Phase Detection AF System
ISO 102400 and 12 fps Shooting with AF
5-Axis SteadyShot INSIDE Stabilization
Support for 14-bit RAW format
Assignable Front Multi Controller
Hybrid Phase Detection AF. This system combines a 79-point dedicated AF sensor with a 399-point on-chip focus system. Shoot up to 12fps continuously with steadfast AF and AE tracking. The supported focus area will depend on the shooting mode and lens used. Furthermore, when "Continuous Shooting: Hi+" is selected, focus will be fixed at the first frame shot when Hybrid Phase Detection AF is active at an aperture setting of F9 or higher, or when Hybrid Phase Detection AF is not active at an aperture setting of F4 or higher.
5-Axis Image Stabilization. The Alpha a99 II is fine-tuned for high-resolution image sensors to compensate accurately for five types of camera shake (about 4.5 stops of shutter speed for sharper images).
Ergonomic. The a99 II is 8% smaller than the a99 with a refined grip and numerous upgrades for improved hold and operation. Designed with tough magnesium alloy, this camera body is built to withstand rigorous shooting conditions.
Selectable storage for remote shooting. Choose convenient selectable still image data storage destinations for remote shooting. While your camera is still tethered to a computer in remote camera control, you can choose whether still images are stored in the camera as well as on the computer so they can be checked visually without having to leave the camera position. You also have selectable storage format in RAW+J mode. You can transfer only JPEG files to the computer, rather than transferring both JPEG and RAW files to reduce data volume, allowing you to check transferred images almost immediately.