First Sony A7s low light test video surfaced over the web. Den Lennie has posted a Sony A7s hands-on review and his A7s post including an amazing A7s high ISO test.
The video below shows the true sensitivity power of the recently announced A7s full-frame mirrorless camera. See it full screen in Full HD mode. The video is actually up to 102,400 ISO noise is acceptable.
The standard ISO range of Sony A7S for still photography is 100 – 102400, for video recording it has ISO200 to 102400. These ISO levels has expandable ranges for still ISO 50 to 409600 and videos ISO200 to 409600.