Need some pointers on focusing moving objects, specifiicly water/surf

Discussion in 'Digital SLR' started by Slack\@, Dec 22, 2005.

  1. Slack\@

    Slack\@ Guest

    I have a new respect for some of you sport shooters; it aint easy and
    there are a lot ways to screw it up. I shot some beach pictures
    yesterday just for practice. We have a huge swell rolling in here in
    Socal, so I thought I might be able to get some interesting pictures.

    I made two big mistakes: forgot to take a WB ref shot and didn't do well
    focusing on the waves. I found it very hard to get the waves in focus
    and pull the trigger before the wave had moved out of focus range. So,
    how do you go about focusing on something as fluid and fast moving as surf?

    Any pointers or criticism would be greatly appreciated:
    http://www.pbase.com/slack/beach__surf&page=all

    On this one http://www.pbase.com/slack/image/53859515/large I think I
    violated the shutter speed vs. focal length rule... should have been
    double the speed (min.) than what I used?
    _____
    Slack
     
    Slack\@, Dec 22, 2005
    #1
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  2. Slack\@

    G.T. Guest

    Yep, or get something with IS. If you wanted f/10 you should have been
    using ISO200 or 400 and 1/250 or faster. Actually, I rarely ever use the
    Rebel XT at 100 any more unless I really need to. I leave it at ISO200 now
    and change when necessary, I used to leave it at 100.

    Greg
     
    G.T., Dec 22, 2005
    #2
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  3. Slack\@

    Slack\@ Guest

    On this one http://www.pbase.com/slack/image/53859515/large I think I
    Yeah, I've been looking at a long(er) IS lens, but getting one without
    the panning IS is worthless to me. The Canons that have both IS types
    are bookoo bucks.
    _____
    Slack
     
    Slack\@, Dec 22, 2005
    #3
  4. Slack\@

    Brian Guest

    Shutter speed doesn't have anything to do with focusing. If you're
    getting blur from moving water or camera shake then you would be able
    to improve the results by upping the ISO and using a faster shutter
    speed.

    For focusing issues there is a AI servo focusing mode (or it's called
    something like that) on the XT that is supposed to help with focusing
    on moving objects - I've never tried it though.

    Brian
     
    Brian, Dec 22, 2005
    #4
  5. Slack\@

    G.T. Guest

    I've used my XT on mtn bike rides and it's AI Servo works pretty well.

    In Slack's sample it looks like the problem is camera shake, though.

    Greg
     
    G.T., Dec 22, 2005
    #5
  6. Slack\@

    C J Southern Guest

    Please tell me that you're not toing 90 MPH down the side of a mountain on
    your bike, taking photos!
     
    C J Southern, Dec 25, 2005
    #6
  7. Slack\@

    G.T. Guest

    Of course! J/K, more like stopping and taking photos of others going 30
    or 40 mph down the side of a mountain. I use my little A70 to take
    photos while riding but not the Rebel XT, and not while I'm doing over
    10 mph, like this one: http://www.2fortheroad.net/pacifico/single.html

    Greg
     
    G.T., Dec 25, 2005
    #7
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