updated 06:43 am EDT, Mon April 7, 2014
New addition to Sony Alpha 7 range aimed at videographers
Sony has added another model to its Alpha 7 line of full-frame interchangeable lens cameras, one with an extremely high level of sensitivity. Where the A7 and A7r offer a maximum sensitivity of ISO 25,600, the A7s ranges between ISO 50 and an extended ISO 409,600, with the sensor said to optimize the dynamic range and minimize noise in dark scenes.
Though it uses a lower-resolution 12.2-megapixel Exmor CMOS sensor when compared to the earlier cameras, the sensor combined with the Bionz X image processor allows it to film video at 4K. While it can only output 4K video to an external recorder, it is still capable of recording 1080p video at 60fps to its memory card, and by changing from full-frame to APS-C, it can film at 120fps at 720p. The resulting video can also be created using XAVC S instead of the AVCHD and MP4 codecs, allowing full HD recording at a data rate of 50mbps. An optional multi-terminal interface shoe lets it operate in conjunction with professional XLR-based microphones.
When used for stills photography, it can shoot at a continuous 2.5fps, which can be pushed to 5fps depending on the mode, and has a 25-point contrast detection autofocus and 1,200-zone evaluative metering. The OLED 2.3M-dot electronic viewfinder has 100 percent field coverage, with the three-inch 921k-dot TFT display adjustable by up to 90 degrees up, and 45 degrees down. Wi-Fi and NFC connectivity is also included, for playback of video or showing images on a smartphone or tablet.
Sony has not yet revealed the availability nor pricing for the A7s.