I have a Canon 17-40mm lens.
Recent files that I have shot with it have a lens profile generated automatically in the Lens Profile Tool.
Just now I opened, (for the first time in C1 - they had been processed in Lightroom before) a folder of files from 2011.
All is well except for the Lens Profile - every slider in the tool is greyed out and cannot be moved.
Any thoughts?
Thanks.
D.