Re: Outdoor/daylight camera profile
Re: Outdoor/daylight camera profile
- Subject: Re: Outdoor/daylight camera profile
- From: <email@hidden>
- Date: Mon, 22 May 2006 19:52:53 -0400
Marco,
How about putting the incident light diffuser on the
EyeOne and measuring the color temperature that way,
using EyeOne Share? I haven't tried it myself, but it
should work, correct?
Of course you can do that, and I could suggest at least
one other program that can give you Color Temperature ;-)
Is it accurate, in your opinion?
The tests I have made comparing the i1 Share Correlated
Color Temperature (CCT) values and the ones derived by my
program correspond very well. I do not like the i1 Share
Color Rendering Index (CRI) data, but this is another
story...
Indoor color temperature measurements can seem "noisy" (or
vary from one measurement to the other) if the instrument
and light setup are not stable. Stability in the
instrument position is important if you have mixed
lighting, because of the wide angle covered by the i1
diffuser (a change in position will change the mix). As
for the light itself, a fluorescent or a halogen lamp that
was just turned "ON" WILL vary with time until stabilized,
both in terms of output level and color temperature.
This is less critical for outdoor measurements, unless you
have rapidly moving clouds! I often measure 5500 K CCTs
through the window around noon. You should not expect high
absolute CCT precision with an i1; I would say about 100
K, which is sufficient for most applications.
You'd want to have a laptop, but that would be a minor
obstacle, and...
... more and more photogapher never go out without it
(their laptop that is), and they should also bring their
i1!
Danny
email@hidden
www.BabelColor.com
On Mon, 22 May 2006 14:45:22 -0700 (GMT-07:00)
Marco Ugolini <email@hidden> wrote:
In a message dated May 22, 2006 2:28 PM, Danny Pascale
wrote:
A suggestion: when you make a profile, record the color
temperature. By having a few profiles at various
(daylight) color temperatures, you simply select the one
corresponding to the actual conditions. Of course, this
requires an instrument to measure the color temperature,
but you indicated some measurements of it, so this should
not be a problem.
Hi Danny.
How about putting the incident light diffuser on the
EyeOne and measuring the color temperature that way,
using EyeOne Share? I haven't tried it myself, but it
should work, correct? Is it accurate, in your opinion?
You'd want to have a laptop, but that would be a minor
obstacle, and, if one already owns the spectro and the
laptop, there would be no need to purchase an expensive
dedicated color meter.
Regards.
-------
Marco Ugolini
Mill Valley, CA
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden