i lost my notes lux2ev

Discussion in 'Exposure Discussion' started by RalphLambrecht, Jun 10, 2012.

  1. RalphLambrecht

    RalphLambrecht Subscriber

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    i lost my notes .does anybody have an equation handy how to convrt lux into ev and visa versa?
     
  2. Mahler_one

    Mahler_one Member

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    Hi Ralph:

    From Ben earlier today....Check-out ehow.com. Converting Lux to EV; 5.5L=1 EV

    Elliot
     
  3. Brian Puccio

    Brian Puccio Member

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    Stack Overflow says:

    See also the Wikipedia article.

    You can also use Wolfram Alpha, which, e.g., confirms the above math by calculating 10 EV to be 2560 lux.
     
  4. fdisilvestro

    fdisilvestro Member

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    Just remember that those values are for ISO 100, otherwise you have to adjust accordingly.
     
  5. RalphLambrecht

    RalphLambrecht Subscriber

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    is there an equationthat considers film speed?
     
  6. Steve Smith

    Steve Smith Subscriber

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    Or call it LV.


    Steve.
     
  7. RalphLambrecht

    RalphLambrecht Subscriber

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    i call it luve
     
  8. andrew.roos

    andrew.roos Member

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    Based on Brian's equation

    lux = (2 ^ ev) * 2.5 * 100 / iso

    Where iso is the film speed.
     
  9. Chan Tran

    Chan Tran Member

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    But if you have an illuminance reading in Lux and want to covert to EV it's a bit more difficult.
    Log(Lux / 2.5) / Log(2)=EV for ISO 100
     
  10. Mahler_one

    Mahler_one Member

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    Hmmmm....I think I'll stay with EV values.....:}
     
  11. RalphLambrecht

    RalphLambrecht Subscriber

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    me too!
     
  12. Vaughn

    Vaughn Subscriber

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    All you need is luve -- just ask any Beatle...