Hi List members Adobe RGB (1998) is gamma 2.2. So I was surprised to see that Photoshop (2022 23.1.1) changed the RGB values of a step-wedge I made in Gray Gamma 2.2 space after I converted it into Adobe RGB space. For example, in Gray Gamma 2.2 space my wedge starts out with RGB values, 0,0,0 / 5,5,5 / 10,10,10 / 15,15,15 / 20,20,20…. and the AdobeRGB(1998) conversion goes 0,0,0 / 13,13,13 / 18,18,18 / 22,22,22 / 27,27,27… Hmm… I just tried the same thing in Photoshop2019 and the RGB numbers stay the same for the conversion from GG2.2 to adobeRGB(1998) and back again. There are some other weird things happing with Photoshop 2022 handling of Gray Gamma 2.2 space black point. If I use a levels layer and lift the black point output level, I have to lift it to 5 before an eye dropper on my image on full black patch, finally moves from 0 to 1. That’s not right. REQUEST Can someone else on the list check this out. And let me know if you are seeing the same behaviour? Maybe there is something broken with our particular install? I am going to stop using Photoshop 2022 with my GrayGamma 2.2 space images till I can get to the bottom of this. Regards Peter Miles