Digital Cameras Guide
Sony Announces Full-frame Alpha 7S with Newly Developed Full-frame CMOS Sensor
Sony has just announced a full-frame mirrorless camera built with videographers in mind - the A7S.
Measuring 126.9 x 94.4x48.2mm, and weighing just 446g (body only.), the A7S carries a new 12.2 MP 35mm fullframe Exmor CMOS sensor, which when paired with the BIONZ X image processor allows it to shoot at a sensitivity range of ISO 50 to a stunning 409,600!
Sony promises "unprecedented" dynamic range and low noise, but the real benefit for videographers is that data is read and processed by every pixel on the sensor for video, allowing the A7S to output HD and 4K (QFHD tp be exact - 3,840 x 2,160 pixels) video using the full width of the sensor. This makes for less aliasing, moiré, and false color artifacts, lending to higher quality video overall.
The A7S allows for both full-frame capture and APS-C (super 35mm equivalent), and records full HD (1920 x 1080 pixels) at 60p, 60i, 30p and 24p direct to memory card, while 4K video at QFHD (3840 x 2160 pixels) can be output to a 4K compatible external recorder. High frame rate 120fps shooting at standard HD resolution (1280 x 720 pixels) can also be achieved if shooting in APS-C mode, creating a 5x slow-motion effect.
Additionally, the A7S will be the first Alpha camera to adopt the workflow-friendly XAVC S recording format in addition to the more common AVCHD and MP4 codecs. This allows for full HD recording at 50Mbps with lower compression. The A7S also gets a multi-interface shoe that’s compatible with Sony’s XLR Adapter microphone kits, thus allowing the use of professional microphone systems.
Other specialist video functions include S-Log2 gamma, which expands the dynamic range by up to 1,300% (as quoted by Sony) and minimizes clipped highlights and loss of shadow detail, a picture profile that can adjust for gamma, black levels and color, and can be saved and shared between cameras for a multi-camera shoot. Full HD and 4K base band HDMI output is supported, as well as time code/user bit, synchronous recording with compatible devices, and various marker and zebra displays both on the LCD and in the viewfinder.
Pricing and availability to be announced.