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  1. #1

    High speed camera

    Hi, I have a suspicion that the answer to this question is a resounding NO, but I'll have a go anyway

    Is it possible to use a prosumer camera (in this case a Panasonic DVX102B) as a high speed camera?

    Specifically: It's for some rowing championships, and apparently for their "photo finish" requirements it is stipulated that they must have a camera capable of shooting at least 100 frames per second.

    Now, I know I can set the shutter speed all the way up to 1/1000, but that ain't the same, is it? I guess what I need here is to up the frames per second from the usual 25/30 fps.

    Can it be done, intrepid forum peoples?

  2. #2
    Hi Clownfish
    You guessed right unfortunately!!!
    The cam only records at standard PAL frames in your case. Most hi-speed cams run a lot quicker than 100fps..usually around 1000fps but they are used to "stop speeding bullets"
    Within a one second period in normal mode your DVX is shooting 1 odd and 1 even frame as interlaced video so effectively so are only getting 25fps!!
    Gosh, I didn't realise it was so critical. a single frame in either progressive or interlaced mode represents about 25 milliseconds. Can such a short interval actually result in a different winner. How far can a boat travel in 1/25th of a second??? I guess they need to be 100% sure??? You might want to look at what high speed still cameras are around?? They use a still cam for photo-finishes in horse racing and the horses run a lot faster than a boat can be rowed!!! See what the racing fraternity might use???


  3. #3
    I'm not sure why they're so pernickity. I was asked this by someone else at the College I work at - cos I'm the "camera guy" y'know. And the "computer guy" (because, y'know, I use a computer to do video editing and multimedia stuff, I must know all about networking and the like too, of course).

    Apparently he's looked into hiring dedicated gear - which is unsurprisingly expensive, especially as I think they have to come from the Mainland (i.e. the "Big Island" - I'm here in Tasmania).

    Thanks for your prompt reply nonetheless!

  4. #4
    Administrator Dave's Avatar
    Join Date
    Sep 2004
    Te Awamutu, New Zealand
    Blog Entries
    The racing industry uses a special type of camera for photo finishes. It doesn't actually take normal photos at all, it only sees a very narrow "slit" at the finish line and creates an image from that. It's hard to explain but you can learn how it works at the link below. Click "Products > Finish Lynx > Overview".

    I'm surprised the rowing champs have stipulated a high-speed video camera instead of a specialist photo-finish camera. Seems an odd approach to me.
    Dave Owen

  5. #5
    Join Date
    Jun 2008
    New York

    Speed? You want SPEED?

    Get the Vision Research Miro described below...

    This bad boy Phantom HD is capable of 1,000fps with resolutions better than 2K.

    If you want more resolution and can live with a slow 140fps, grab a Phantom 65 and you'll get 4K

    MIRO - Max resolution of 800x600 but does 512x512 at 2,200fps, you your reading that right.

    The Phantom 5.2 records at 1,000fps at 1152x896 - super impressive. Holy Smokes, it can record at 148,000fps (yes, I wrote one-hundred forty-eight thousand) at lower resolutions.

    Check out june copy of Videography. This is where I got my info.

  6. #6
    Thanks for all those - I'm not really sure why the specs are the way they are. But then, I'm getting this second-hand as well.

    The usual story in the industry. As one of my lecturers once said to me: "You're the last person to be consulted, and they always want it yesterday."


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