Datacolor User to User Support Group.

--- In colorvision_group@yahoogroups.com, CDTobie@... wrote:
> You are told to set them to factory defaults; if you don't have a 
reset 
> control, I would recommend 50 percent contrast and 100 percent 
brightness as 
> starting values.

Thanks a lot for all that.

But here is a crucial issue, I think:

i am glad to read that there is such a thing as a standard luminance 
unit (candela). But how on earth do your Brightness and Contrast 
adjustments on your screen relate to this?? Is there any clear 
corellation between 1% change in Brightness and the increase of your 
black point by such and such candelas?! what about contrast?

Plus here is another critical point: what exactly is your Brightness 
and your Contrast adjustment knobs doing to your black and white 
point on an LCD screen? I read somewhere that an LCD can only offer 
one adjustment, which is the backlight of the display (most likely to 
affect only your black level (brightness?), I would have thought)?...

Now, the factory settings on my LCD (NEC multisync 1980 FXi) are 
as assumed Brightness: 100% and Contrast: 50% but this gives a very 
high black level indeed (too high )! Plus, i work with agencies in 
europe to whom I send processed files. most of these agencies still 
use CRT's which tend to be naturaly "darker" than LCD's. Could i 
possibly ask them to measure the luminance of there black and white 
point and try to "copy" them on my screen before calibrating? how 
would i go about this? Ideally they would provide me with a measure 
in candela for each point and i would feed it to my software, or I 
would be able to establish a corellation between the candela values 
and my settings?...