It wasn't too long ago that Sony launched the A7 and AR cameras. But now it's just announced the A7s, which uses the same body as those cameras but with a different 12.2-megapixel sensor. And the kicker here is that the camera can do 4K video.
Just to be clear, the camera doesn't do 4k video natively. You need to hook it up to an external 3rd party 4K recorder for that. But you can record full HD (1920x1080) to memory cards at the following frame rates: 60p, 60i, 30p and 24p. You can also switch between full-frame and APS-C.
The 4K video feature is new to Sony for this range and it's just one of many features added to this particular body. There is also a Dual Record feature that lets the camera capture both a 50Mbps XAVC S stream as well as a lower bitrate 720p stream.
UPDATED 20/06/14: But what sets this unit apart is its wide ISO sensitivity, thanks to a 12.2MP sensor. It enables the A7s camera to collect more light than a traditional camera, making it suitable for picture taking in dark or low-lit environments such as dimly-lit indoor sporting halls. How this works is, the camera shoots at high shutter speeds while keeping noise as low as possible.
Power in a lightweight body
Looks-wise, the camera looks a lot like its older brethren. It also supports wireless transfers with Wi-Fi and NFC, and you can make use of the Multi Interface Shoe to add Sony add-ons like the XLR-K1M mic adapter kit.
Sony also announced it will be developing a complementary full-frame power zoom 28-135mm F4 lens E-mount lens.
UPDATED 20/06/14: As for pricing and availability, Sony has just announced that the A7s full-frame interchangeable lens camera will be available from 26 June, for S$2999 for the body alone (without the lens).