Sony A99 new autofocus system explained

The above image illustrates the Sony A99 AF system: 102 sensors, 39 "classical" (of which 11 cross sensors), 63 on the sensor.

See this post for a complete list of a99 specifications. The camera will be announced on September 12, 2012 together with several new accessories.

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  • Arn

    Exmor APS HD fCMOs or the sensor description, what the heck is APS- HD ?

    • Musouka

      Merely a marketing term for an APS-C sensor that can shoot HD video. As TRL mentions below, it’s unlikely that the illustration shows the A99.

      • http://genotypewritings.blogspot.com genotypewriter

        Would it kill you to Google it first?

        http://en.wikipedia.org/wiki/Advanced_Photo_System#Design

        Not saying this is what Sony’s going to do but you can’t just go calling it a “marketing term” when there is a proper meaning to what “APS HD” means.

        • Musouka

          “H for “High Definition” (30.2 × 16.7 mm; aspect ratio 16:9; 4×7″ print)”

          It seems to me this is talking about APS-H. Canon used a similar sensor size for its 1D series (1.3x).

          For the record, the A77 and all other cropped Sony cameras use APS-C (1.52x). I have actually Googled to make sure Sony used the “Exmor™ APS HD CMOS” term for the A77 before posting. So, yes, it sounds like a marketing term to me :)

          http://en.wikipedia.org/wiki/APS-C#Multiplier_factors

  • TRL

    Good for illustration, but the picture above is obviously the A77: see the “APS” in the sensor name, the lens is the 16-50/2.8 – which is an APS lens.

  • TRL

    …forgotten to mention the old Sony / Minolta hot-shoe (the A99 is going to have a new, standard ISO one), and the green “auto-modes” on the dial knob.

  • http://www.flickr.com/brunocandeias Bruno Candeias

    meh, that’s too complicated for me.. I prefer a simple, optic rangefinder :P

  • brian

    Didn’t Nikon patent this af module on sensor technology or something similar a few years ago? I wonder if sony and others are licensing this from Nikon?

    • Art

      Sony had on sensor PDAF AF patents log before Nikon. Here is Sony patent for on sensor PDAF that was originally filed in 2009

      http://www.freepatentsonline.com/y2011/0063484.html

    • Boren

      Fuji had main-sensor PDAF a year before Nikon, so it’s more likely that Nikon is licensing the technology from Fuji. In any case, there more than one way to skin this cat. The technology Fuji, Nikon, Canon and Fuji are using can be slightly different, enough to avoid patent issues.

  • lalala

    Sony imitated:
    olympus e-20p
    olympus e-330

    • Boren

      I have a Sony A77 and an Olympus E330, and although both have fast AF in live-view, the Sony implementation is more rounded and a lot more enjoyable to use. The E330 is a pioneering camera, but one with too many flaws. I bought it strictly for its LV technology and always ended up using my Minolta 7D (which is still my favorite camera of all time). With the A77 I can finally use the LV implementation I was looking for with the Oly.

  • Boren

    I have both a Sony A77 and an Olympus E330, and although both have fast AF in live-view, the Sony implementation is more rounded and a lot more enjoyable to use. The E330 is a pioneering camera, but one with too many flaws. I bought it strictly for its LV technology and always ended up using my Minolta 7D (which is still my favorite camera of all time). With the A77 I can finally use the LV implementation I was looking for with the Oly.

  • http://www.niklasbergstrand.com Niklas

    Wouldn’t the sensor be bigger on a FF-camera in this scale, especially in a illustration like this for the new high end camera? My guess is that this is an APS-C model. Justsayin..

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