Message
Re: [colorvision_group] Re: 3 questions concerning calibration procedures with spyder express/ 2suite/ pro
2006-04-23 by CDTobie@aol.com
In a message dated 4/23/06 11:49:45 AM, esimanor@... writes:
--- In colorvision_group@yahoogroups.com, CDTobie@... wrote:
> Does it matter?
Does it matter to adjust your gamma and your white point temperature
to given values?
Yes, if you wish to be calibrated to specific standards...
just tweak them until the result seems pleasing to
your eyes and that's it...
If pleasing is all that you need...
but if you want to get any close to see your files on your screen
more or less as your client will see them on his screen (provided you
work with more or less the same ambiant light, which can be
achieved), with similar shadows, mid tones and highlights, then you
need to achieve similar luminance display target. Or does that not
make any sense?
It does when you use Spyder2PRO to adjust your Whitepoint (the color of white). But your black luminance really has to do with what your monitor can manage, and your white luminance should really be set to relate to your ambient light. Unless you are running monitors side by side, its not necessary to set these to a predefined standard.
You adjust the controls, the Spyder reads the results. When
> you have gotten as close
Close to WHAT?
To the target values you specified when you began. If your target black luminance is set to .4, then the software will assist you in adjusting to that. Of course, if your monitor's native blackpoitn is .6, and you chose .4 because it sounded better to you, there is no way you will be able to lower the blackpoint, so you will fail to reach that target, just as asking for a black darker than what your printer, inks, and paper can manage is not possible.
For white, I would recommend you use the ambient light function of Spyder2PRO v2.2, and choose an appropriate white luminance value for your situation, instead of simply running your monitor at max luminance, which may be way off for your lighting (causing poor matching), not to mention burning your monitor out faster than necessary. White is very relative (as the eye is very adjustable), and unless monitors are side by side, setting them to the same white luminance is not necessary (or desirable), while setting them to appropriate white luminance for your environment is very necessary.
C. David Tobie
Product Technology Manager
ColorVision Business Division
DataColor Inc.
CDTobie@...
www.colorvision.com