[Tig] theatre screen luminance standard

[Jim Houston]

Also handy for some standard daylight illuminants... (not just the  
color temperature)

http://en.wikipedia.org/wiki/White_point


On Nov 1, 2006, at 2:10 AM, Hakan Toptas wrote:

>
> 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.
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>>
>>
>> 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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>>
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