Re: Lux

From: Bjorn Gimle (b.gimle@chello.se)
Date: Mon Jan 28 2002 - 05:33:45 EST

  • Next message: Bjorn Gimle: "Re: Lux"

    A web search on +lux +magnitude at www.evreka.com gave this:
    
    En comparant les éclats du soleil et d'un étalon de laboratoire, puis ceux
    du soleil et d'une étoile, on peut ramener toute magnitude visuelle à un
    éclairement E exprimé en lux au moyen de la relation suivante: log E(lux)
    = -0,4×(m + 14,2).
    
    I believe the Sun is -26.7; this gives exactly 100000 lux.
    
    ----- Original Message -----
    From: "Tom Wagner" <sciteach1950@home.com>
    To: "Astronomy-eGroup" <astronomer@yahoogroups.com>
    Cc: <Shoot-for-the-Stars@yahoogroups.com>; "SeeSat"
    <SeeSat-L@blackadder.lmsal.com>
    Sent: Monday, January 28, 2002 1:53 AM
    Subject: Lux
    
    
    > Anybody know of a way of mathematically comparing visible magnitude with
    the
    > lux, a unit that is used to describe the minimum amount light that video
    > cameras are sensitive to?
    >
    > Always looking up,
    >
    > Iowa Tom
    > USA
    >
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