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Digital BW, The Print

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Message

Re: [Digital BW] difference in Gamma 1.8 and Gamma 2.2 numbers

2004-03-25 by Johnny Eades

Hello Paul,

GG 1.8 is my working gray profile defined in color settings in 
Photoshop. The monitor is set at GG 1.8 and Photoshop is set at GG 
1.8. The 21 step grayscale is showing 148 at 50% at GG 1.8, and it 
shows 127 at GG 2.2 (if I assign it GG 2.2). I do all of my work at 
GG 1.8 now. I just am curious as to the reason for the majority of 
the Grayscales I've seen using 127 as the 50% reading.I someone had a 
monitor set at GG 1.8 and didn't know it, they would have a hard time 
getting the numbers to match the grayscale; wouldn't they?


Your friend in Photography,

Johnny





--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul D. 
DeRocco" <pderocco@i...> wrote:
> > From: Johnny Eades [mailto:jeades1@s...]
> > 
> > There has been something I have noticed when I changed from Gray 
> > Gamma 2.2 to Gray Gamma 1.8. When I have the 21 step grayscale 
which 
> > has the density marked in percentages,and I pass the eyedropper 
tool 
> > over the 50% square and am using GG 1.8; the number of the 
percentage 
> > is 58% and the number relative to 0 to 255 is 148. If I reset the 
> > Gray Gamma to 2.2 the numbers match the grayscale markings.I have 
> > come to realize the grayscale was intended to be viewed at GG 
2.2. 
> > Does anyone have a grayscale that is calibrated with the numbers 
to 
> > be viewed at GG 1.8. Even the grayscale from PiezographyBW is 
marked 
> > like the GG 2.2 scale and Jon Cones recommends the monitor and 
the 
> > workspace of Photoshop both be GG 1.8. Has anyone else dealt with 
> > this question and resolved it to their satisfaction yet? If so 
please 
> > share with this group. I wouldn't think I was the only one 
noticing 
> > this anomaly.
> 
> Just assign the 1.8 profile, instead of converting to it.
> 
> -- 
> 
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@i...

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