[Tig] theatre screen luminance standard

[Laurence Claydon]

Hi,
 
Take a look at www.brucelindbloom.com for a handy calculator. Remember to specify the illuminant, otherwise the correlated colour temperature will be incorrect.
 
By the way, I think my LED Maglite is still underneath your 35mm projector. It's yours if you can fish it out!
 
Kind Regards,
Laurence Claydon

________________________________

From: tig-bounces at tig.colorist.org on behalf of Hakan Toptas
Sent: Wed 01/11/2006 10:10
To: Jim Houston; Rob Lingelbach; Telecine Internet Group
Subject: Re: [Tig] theatre screen luminance standard



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Is there a calculation formula or a chart between kelvin and x,y values.
x=.314, y= .351 means 6300K.
What should be the x,y values for 5400, 5600 or 5800K.

Thanks and regards,
Hakan Toptas
Sinemaj, Istanbul



----- Original Message -----
From: "Jim Houston" <jim at power.net>
To: "Rob Lingelbach" <rob at colorist.org>; "Telecine Internet Group"
<tig at tig.colorist.org>
Sent: Tuesday, October 31, 2006 5:19 PM
Subject: Re: [Tig] theatre screen luminance standard


> TIG is supported by subscribers.
> see http://tig.colorist.org for
> donation button interface.  The Wiki is
> down temporarily
> --
>
>
>
> For film projection,  16fL open gate at 5400K (more or less- it has a
> wide tolerance, typical is 5600-5800)
>
> For digital projection,  14fL(48 nits)  at  DCI P3 (x=.314, y= .351)
> approx 6300K CCT.
>
> All of these are measured off the screen.
>
>
> On Oct 31, 2006, at 5:44 AM, Rob Lingelbach wrote:
>
> > TIG is supported by subscribers.
> > see http://tig.colorist.org for donation button interface.  The
> > Wiki isdown temporarily
> > --
> >
> > I'm sure this has been covered before but (tail between legs) I
> > don't have a search facility
> > working right now for the archives.   Can someone tell me (and
> > another couple of colorists
> > who are interested) the standard, SMPTE or other, for screen
> > luminance in projection theatres?
> >
> > there could be some caveats in this kind of general question with
> > which I'm somewhat aware,
> > but if a standard exists, please let me know, thanks in advance.
> >
> > Rob Lingelbach
> > Colorist
> > Pixion, Mumbai, India     http://www.colorist.org/robhome.html
> >
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