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Image processed on iPhone looks dark on Desktop

Aug 24, 2008
Lightroom Version
Operating System
Windows 10, iOS
I processed an image on LRcc on Iphone, then viewed it on my desktop (old 28inch Apple Cinema Display), but it appeared much darker. No doubt there is a difference in brightness between my iPhone screen and my ACD screen. Do I adjust one, if so which one? If I adjust the ACD brightness, then when I come to do the occasional print will I get the brightness of the print wrong? I will no doubt have to experiment!
Sep 29, 2007
Southampton, UK
Lightroom Experience
Power User
Lightroom Version
Cloud Service
Are you calibrating the ACD Chris? If so, then that's the one to match to.