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Sony launches 12.2MP A7s full-frame camera with ISO 409,600 capability

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.

Sony A7s
Sony A7s

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.

by MacNN Staff



  1. prl99

    Mac Enthusiast

    Joined: 03-24-09

    Interesting full-frame/APS-C format with "specs" that say it can shoot in the dark. The only problem with an ASA (shows my age) that high is there's so little light everything will come out flat. I did some quick research and Nikon announced their D4s this year with the same maximum ISO. I can see Nikon using it but Sony just isn't the same level of camera system. I found a review of the D4s at dpreview/previews/nikon-d4s/6 and comparing photos at 409600 and 1600 tell me the ultra high sensitivity of their sensor just doesn't produce much of an image.

  1. shawnde

    Fresh-Faced Recruit

    Joined: 04-01-08


    As far as I know, most camera manufacturers use Sony sensors (which is not a good thing), including Nikon. The difference is probably the Nikon optics.

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