Re: WB, Gray Cards and Cloudy Days
Re: WB, Gray Cards and Cloudy Days
- Subject: Re: WB, Gray Cards and Cloudy Days
- From: Thomas Lianza <email@hidden>
- Date: Mon, 19 Aug 2013 11:08:44 +0000
- Thread-topic: WB, Gray Cards and Cloudy Days
Hi Lou,
You haven't really stated how you are viewing these effects. The
difference between being immersed in ambient light and viewing a scene,
verses viewing the same scene on a display in a darkened room is huge and
nearly impossible to characterize. How did we ever live with film? When
I shoot, I always use daylight (5000k) or tungsten. I never try to white
balance a scene, particularly when I am immersed in ambient light. My
recommendation is to shoot with fixed white balance and tune the scene in
post production. You should also realize that viewing conditions and the
display calibration state have a great influence on the color you are
perceiving. It is also quite possible that two displays of differing
technology, will alter your perception of the scene, even if they are
"perfectly" calibrated, so discussions like this tend to devolve into
technical food fights.
Regards,
Tom Lianza
On 8/18/13 8:11 PM, "Louis Dina" <email@hidden> wrote:
>Terry/Thomas:
>
>Thanks for the suggestion about using the warm/cool patches. I only have
>the standard 24-patch CC target that came when I bought i1Profiler
>(without
>the plastic case, which seems pretty chintzy, by the way. For the money,
>Xrite could include the whole enchilada, with warm/cool patches and all.)
>
>It appears I am doing what many people suggest...ie, splitting the
>difference between standard daylight and a gray card reading in overcast
>conditions. Some people are using noon lighting conditions for all outdoor
>shots and letting the image take on whatever color cast the atmospheric
>conditions create. These responses seem to confirm my thinking for shots
>which wish to capture the prevailing atmosphere and color.
>
>When I want to eliminate the effect of prevailing conditions and to
>neutralize the light, WB off a spectrally neutral gray card works great,
>but it forces the exposure to simulate daylight conditions. That's what I
>often want with portraits, macros, isolated objects, etc, but not
>necessarily for scenics.
>
>Are there any in-depth studies on color and human perception anyone can
>point me to that deal with this more objectively and scientifically? No
>problem if there aren't, but I'd like to have a better understanding of
>how
>it works. I know it's a difficult and complex thing, so maybe this
>information is not readily available.
>
>Thanks again,
>
>Lou
>
>
>
>
>
>
>
>
>On Sun, Aug 18, 2013 at 5:24 PM, Terence Wyse <email@hidden> wrote:
>
>> Why not just use the ColorChecker Passport and use the custom warm/cool
>> white balance patches to get the scene rendering you want? Click one of
>>the
>> cooler patches to bias the WB to the warm side and visa/versa if you
>>want a
>> cooler WB. I do this all the time when shooting very early morning or
>>late
>> evening.
>>
>> Terry
>>
>>
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