A&P focusing "modes" ... do i have this right?

Discussion in 'Lifestyle' started by ace3, Oct 22, 2007.

  1. ace3

    ace3 mouthify my wang.

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    Omaha NebrASSka Posts: 15
    so, i have:
    One Shot
    AI Servo
    AI Focus

    on my canon.

    am i correct in saying that:

    One Shot - locks the focus once it's focused, regardless of if the subject moves (why would you want this?)

    AI Servo - focus changes automatically if the subject moves around (makes sense)

    AI Focus - some sort of hybrid between the two? why would you want this?

    :dunno:
     
  2. kristin

    kristin my dog > *

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    In for this answer :rofl:
     
  3. spizarxxx

    spizarxxx DSLR, GSD, DJ CREW & OT's Resident On Air Personal

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    test it our there is no right or wrong answer, its based on wha tyou shoot and how you shoot as well
     
  4. CornUponCob

    CornUponCob New Member

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    The AI focus IMO doesn't do a a very good job.

    It claims that it switches to AI servo when your subject moves, but it has to move quite a bit before it will actually change focus.

    Like.... if you were shooting baseball in AI focus and you focused on an outfielder, and then moved to the 1st baseman, the focus would indeed change even if you maintained the half press.

    But let's say you were focused on the outfielder, and then he began walking towards you. It will take the camera a few seconds before it switches to servo to track the player.

    For that very reason, when shooting things where I often want to switch back and forth between AI servo and one shot, I use the C1 and C2 dials. It's faster than pressing the button and turning the click wheel IMO.
     
  5. ace3

    ace3 mouthify my wang.

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    ^^ sorta makes sense.

    why would you use one-shot?

    C1 & C2 are the "programmable mode" buttons, i assume?
     
  6. CornUponCob

    CornUponCob New Member

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    I like to shoot batting, pitching, and coaches in one-shot. Everything else (running, fielding, etc) shoot in AI servo. Lots of switching back and forth.

    And yeah, those are the dial positions. I keep C3 set to MLU for tripod work (because I hate changing a bajillion settings to do it).
     
  7. Derrict

    Derrict No, I am not Amish OT Supporter

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    Depends on the body. If you use AI Servo on a 1D series body (45 point AF system), you'd say otherwise.
     
  8. Uncle Phil

    Uncle Phil OT Supporter

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    one shot - static images
    ai servo- sports or anything moving
    ai focus - not my cup of tea
     
  9. tenplanescrashing

    tenplanescrashing Active Member

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    on nikon, you have S, C & M most of the time. I use single shot/single focus almost all the time. you don't need continuous focus for anything that isn't constantly moving
     
  10. CornUponCob

    CornUponCob New Member

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    I'm talking about AI focus, not AI servo.

    AI servo on the 40D is fine. I used to think it was fine on the 30D until I got the 40D.
     

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