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Thread: Prosch Duplex brass lens timing issue

  1. #11
    (Shrek)
    Join Date
    Mar 2011
    Location
    Montreal
    Posts
    1,545

    Re: Prosch Duplex brass lens timing issue

    Quote Originally Posted by Steven Tribe View Post
    Photographing falling silver balls in sunlight and measuring the "track" lengths on the plate - well I never!
    The balls have to reach terminal velocity.
    It's a very simple physics problem to do this if you know the height from which it's dropped, in fact it would work better dropped just above the lens because the classic acceleration formula doesn't account for friction.

  2. #12

    Re: Prosch Duplex brass lens timing issue

    Thanks all. Good info. I knew I came to the right place.

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