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Digital BW, The Print

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Message

difference in Gamma 1.8 and Gamma 2.2 numbers

2004-03-24 by Johnny Eades

Hello all,

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.

Your answer seeking friend in Photography,

Johnny

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