Sony Artisan Brian Smith has written an article about his favorite new features in the a99 II that was announced at Photokina. He breaks down what's completely new, what's new to full frame and what's new to A-mount. Among Smith's highlights are:
AF & Metering Features
4D Predictive AF which uses a combination of the camera's 79-point Phase-Detection AF sensor and the 399-point Focal-plane Phase-Detection AF Sensor. This system is only possible with a translucent mirror camera.
Low-light AF performance matching the α7S & α7S II
New metering modes & improved Spot metering
Shooting Speed
12 fps shooting at full 42.4 megapixels
8 fps with minimal display lag in Live View
Flicker-free high-speed shooting in challenging lighting conditions like fluorescent
5-axis In-Body Image Stabilizing (IBIS) developed for A-mount cameras
Video Features
4K internal recording without pixel binning or line skipping
Fast & slow motion video recording modes
S-Log2 and S-Log-3
Ability to extract 8 megapixels stills from 4K video
File Naming and Storage
Custom naming and copyright embedding
Image storage options when shooting tethered
