Looks good, not that I understand it.
canon patent 02 11 09 - Canon Patents a New Live View Autofocus System

From Engadget via Photography Bay: http://www.photographybay.com/…..

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21 Comments

  1. nevermind my mirror shaving comment
    the pentaprism+flash setup looks like a xxD anyway
    so no FF here :(
    unless Canon decides to give their FF a flash ;)

  2. Photographer/Videographer on

    well, would be TERRIBLE to have this feature only in an APS-C sensor camera and Not in a FF camera….

    I think it wouldn’t make sense.

    In case of the FF camera bodies, I supose Canon would make them a bit bigger to get enough space to put it inside.

    Otherwhise it would be ridiculous to have faster LiveView AF in xxD than in xD DSLRs

  3. I doubt this will be a pro level camera option. Look at the DxO measures and how companies struggle for a few digits iso sensitivity. By using a partially reflecting mirror they would have to give up some good part of the light for the AF metering. And it does need light – as you know the AF becomes slow on slower lenses.

    UNLESS of course the partially reflecting surface swings upwards when taking a picture, like the mirror does right now. That would be a nice solution. It could stay down for video I guess, losing some light in favor of a video AF.

    Of course, I could not image for Nikon not to have such a patent?! :-p

  4. > This improvement indeed will help a lot the Movie/Video mode in DSLRs, wich is also going to be improved and implemented in future DSLRs, despite some people like it or not.

    But all the time DSLRs use CMOS sensors it’s a half-baked implementation. Unless they can figure some way to prevent image degradation on movement.

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