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  1. #11

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    Oh, forgot to mention one more thing. My Minolta suggests no magenta/green filtration but about -30 mired red/blue filtration for the speedotron flash heads.

  2. #12
    Leigh B's Avatar
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    It sounds like your meter is working properly. That's a good reliable CT meter.

    Drop in CT for flash units is usually caused by material being deposited inside the tube as it's used.
    The coating usually has a slight reddish cast, which lowers the CT of the flash.

    I used to be a warranty service station for Novatron, and had occasion to replace flash tubes for that reason.

    - Leigh
    “Wise men talk because they have something to say; fools, because they have to say something.” - Plato

  3. #13
    Leigh B's Avatar
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    Quote Originally Posted by Pasto View Post
    Oh, forgot to mention one more thing. My Minolta suggests no magenta/green filtration but about -30 mired red/blue filtration for the speedotron flash heads.
    If that's really the only issue, you could correct it inexpensively using Rosco gels over the strobe heads.

    - Leigh
    “Wise men talk because they have something to say; fools, because they have to say something.” - Plato

  4. #14

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    Just got word from Speedotron and, as suggested by Leigh, it is normal for older bulbs to drop in color temperature. I either get new bulbs or gel the heads. My meter suggests a wratten 82B as the proper correction filter. Any idea how this converts to CTB filtration?

  5. #15
    Leigh B's Avatar
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    Hi Pasto,

    I have no idea how to convert from Wratten numbers to Rosco product codes. Perhaps someone else knows.

    You know the gel will be a light blue. I would buy a pack of same, preferably in assorted densities, and experiment. You can always stack two or more if needed.

    - Leigh
    “Wise men talk because they have something to say; fools, because they have to say something.” - Plato

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