Archived posting to the Leica Users Group, 2006/01/16

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Subject: [Leica] OT: EV to lux conversion
From: jwlee01 at gmail.com (John Lee)
Date: Mon Jan 16 21:14:20 2006
References: <a32e5d10601161938s1ba9ea93k3976262dd16a5a4b@mail.gmail.com> <NEBBJDFBIKOBILIKPPBNOEIFDIAB.red735i@earthlink.net>
 
Believe it or not, it doesn't make any difference - base 10, base 2,
base e or whatever!
Try it with some sample calculations. -- John

On 1/16/06, Frank Filippone <red735i@earthlink.net> wrote:
> Can't do this one in my head...As much as it seems inconceiveable, I dod 
> not
> memorize the Log tables... but I could take a shot at it......Is it 
> cheating
> if I use a set of Trig tables I got from my Father when HE went to MIT in
> 1939?
>
> The Log is to the base of 2 or 10?
>
> Frank Filippone.. getting psyched to do this with the least amount of
> electrons destroyed......
> red735i@earthlink.net
>
>
>
> The formula is
>
> log(lux/2.5)/log(2)=EV
>
> -- John
>
> >
> > i need to know what EV reading equals 10,000 lux.
>
>
>
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>
In reply to: Message from jwlee01 at gmail.com (John Lee) ([Leica] OT: EV to lux conversion)
Message from red735i at earthlink.net (Frank Filippone) ([Leica] OT: EV to lux conversion)