Canon's new "hybrid" IS

Discussion in 'Canon' started by Me, Jul 22, 2009.

  1. Me

    Me Guest

    Me, Jul 22, 2009
    #1
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  2. Me

    John A. Guest

    "First" with an asterisk, I see. What else had it before?

    I know the Pentax K7 has rotational correction about the axis running
    through the lens to compensate for shutter-push torque.
     
    John A., Jul 22, 2009
    #2
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  3. Me

    John A. Guest

    "Sudden changes in camera angle can cause significant blur in images
    taken during standard shooting, whereas blur caused by shift-based
    shaking, when a camera moves parallel to the subject, is more
    pronounced in macro and other close-up photography."

    I take that as implying that angular shake isn't such a big deal with
    macro & close-up shooting, so the tech won't make as big a difference
    there.
     
    John A., Jul 22, 2009
    #3
  4. Me

    Me Guest

    I expect that angular shake remains just as much a big deal at macro
    distances, but gradually overshadowed by the effect of linear shake.
    So, perhaps it can make quite a big difference.
    One other difficulty with such close distance hand-held shooting (and
    long tele shooting) is getting a steady image in the VF - it's really
    hard to do, especially if you're trying to hold the subject within AF
    brackets, for either AF or to use the electronic rangefinder (focus
    confirmation light).
     
    Me, Jul 22, 2009
    #4
  5. Me

    Doug Jewell Guest

    Pentax have had it since the K10D.
    How Canon do it in-lens is a bit of a head-scratcher for me
    though.

    Since most everyone will agree that in-lens does a better
    job of IS than in-body, but in-body is cheaper, wouldn't the
    ideal solution be a combination of both? If the lens has no
    IS, then the body does it. If the lens has vertical and
    horizontal IS, then the body locks those movements on the
    sensor and provides rotational IS. If the lens offers IS on
    all axes, then the body locks the sensor completely and lets
    the lens do it.

    Or alternatively, it would need more processing power, but
    the 2 could work together to provide even greater levels of
    IS than can be provided by one system.
     
    Doug Jewell, Jul 23, 2009
    #5
  6. Me

    John A. Guest

    Not really. Apparently there was a review somewhere that claimed that,
    but Pentax never did, and never had it, until the K7.
    They don't, at least not rotating about the through-the-lens (roll)
    axis. They do it for the other axes (pitch and yaw). To compensate
    in-lens for rolling would take some very exotic optics. Much easier to
    turn the sensor than to twist the light.
    As noted above, the body would handle the rolling axis, but yeah.
    I agree. A hybrid system would be best.
     
    John A., Jul 23, 2009
    #6
  7. Me

    Charles Guest

    I wonder why dpreview consistently regurgitates manufacturers' hyperbole for
    new products. Is it really necessary for this website to do this? A simple
    announcement (without a cut and paste from the marketing hype) followed by
    an unbiased hands-on review would serve better. Just my 200 cents (adjusted
    for inflation).
     
    Charles, Jul 23, 2009
    #7
  8. Me

    Ray Fischer Guest

    It's called a "press release".
    If you understand that they're just posting relevant and (possibily
    interesting) press releases then it's a useful service. You just
    cannot take it as being any sort of endorsement.
    Reviews take time. That's why they come later.
     
    Ray Fischer, Jul 24, 2009
    #8
  9. How long are your (typical) macro lenses? How long are your
    (typical) long lenses?

    -Wolfgang
     
    Wolfgang Weisselberg, Jul 25, 2009
    #9
  10. Me

    John A. Guest

    Exactly. 1° of shake covers a lot more of the frame on longer lenses.
     
    John A., Jul 25, 2009
    #10
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