D50 vs 5000 Kelvin
D50 vs 5000 Kelvin
- Subject: D50 vs 5000 Kelvin
- From: "Bob Burnett" <email@hidden>
- Date: Thu, 19 May 2005 07:33:23 -0700
D50, D65 and D75 are all special case illuminants that lie on what is called the daylight locus (a curve that passes through the center white area of the CIE xy graph). 5000, 6500, 7500 and so on Kelvin are different color based on the blackbody locus, which is an entirely different curve. D50 and 5000 Kelvin have very different chromaticity coordinates so calibrating to one or the other will give you different results. The difference is kinda like calibrating to 5000K and then to 5200. They are generally close but side by side the difference is visible.
Bob
>
>>On 5/19/05 7:14 AM, "Peter Karp" wrote:
>>
>>>> You can't actually calibrate to D65 (any more than you can 6500K).
>>>
>>> You can calibrate to a specific correlated color temperature like
>>> 6500K, but not to a specific spectrum.
>>
>>Exactly, we're talking about a range of possible colors.
>>
>>> I'm pretty sure that choosing D50 or 5000K will make no difference at
>>> all.
>>
>>I'm not sure that's true of ALL products. In fact there was a very old post
>>I can try and dig up about Optical and the differences a user perceived
>>between the two settings, raising the question, why pick one over the other?
>>If they are the same, I think we need the software vendors to tell us why
>>they offer both and how a CCT of 5000K can be the same color of white after
>>calibration as D50. This certainly isn't helping the mass of users who say
>>color management is too complicated.
>>
>>Andrew Rodney
>>www.digitaldog.net
>>
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