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"Lightmeter" any use for setting a TV

Discussion in 'Archived Threads 2001-2004' started by Robert Mayrand, Jun 6, 2002.

  1. 1 Jun 6, 2002
    Robert Mayrand

    Robert Mayrand Stunt Coordinator

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    I bought Avia and did some quick tuning, but Still always have some difficulties setting white and black level particularly white. Since I'm also into photography I was wondering if I could use my lightmeter to do some calibration. My lightmeter is a quite expensive instrument and if i could find it another use it would be great. It's the top of the line sekonic with all the feature (508cine) with a spot meter and is really, really accurate.

    Thanks for your help.
    Robert
     
  2. 2 Jun 6, 2002
    Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Greetings

    You can use it to set the contrast level of the TV. Aiming for 15 to 20 ft-l for RPTV's and 20 to 30 for Direct Views.

    Regards
     
  3. 3 Jun 6, 2002
    Robert Mayrand

    Robert Mayrand Stunt Coordinator

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    What exactly are those number. I'm use to many light measurement foot candle, candel, lux, lumens but i'm not sure about FT-I???? Maybe my english is a bit too limited. Can i use one of avia test pattern to do this? They suggest somewhere a checkboard grid measuring black & white space, i suppose that it must be the différence between the two?
    Any other suggestions?

    Thanks
    Rob
    Mtl, Quebec
     
  4. 4 Jun 6, 2002
    Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Greetings

    Foot-Lamberts ...

    Use the AVIA 100 IRE windowbox.

    Regards
     
  5. 5 Jun 7, 2002
    Robert Mayrand

    Robert Mayrand Stunt Coordinator

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    I'm feeling a bit dumb right now, sometimes simples things just don't come to mind.

    Thanks!

    Rob
     
  6. 6 Jun 7, 2002
    Robert Mayrand

    Robert Mayrand Stunt Coordinator

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    By the way is there anything else that the lightmeter could be use for?
     
  7. 7 Jun 8, 2002
    Les Holt

    Les Holt Agent

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    Yes, I think a decent light meter could also be used to focus the set electronically and mechanically.

    At optimal focus, the light output from the set should be at minimum because the fewest phosphors are being activated.

    It can be hard to see optimal focus visually, especially with the blue gun. A meter can help provide objective information.

    Les
     

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