At the NAB Show currently taking place in Las Vegas, Nevada, Sony has announced the Alpha 7s, a full-frame mirrorless camera with some serious 4K recording capabilities.
The A7s' 12.2 megapixel Exmor CMOS (Complementary metal–oxide–semiconductor) sensor is paired with Sony's BIONZ X image processor, giving the camera an enormous sensitivity range of ISO 50 – 409600, meaning the camera can shoot 4K video in almost complete darkness.
The feature has its limitations: you can only store 1080p video internally; for 4K video, you'll need to pair the A7s with an external recorder.
Sony also points out that the Alpha 7s is the world's first camera that utilizes the entire width of a full-frame sensor for 4K recording, giving videographers all the features provided by the camera's sensor.
Pricing and availability of the A7s will be announced at a future date.