On February 4, 2019 at 13:21, Ernie Gilman said...
The artist has specified that the center of the image is to be in focus, and it's understood that the focus will degrade as the image gets wider.
And the artist has physically installed this in the studio and is giving dimensions and instructions from there. The focus has been seen. The change (we'd correctly say "degradation") of focus has been seen. The location of the best focus has been defined.
Why the eff didn't you tell us before now? 99% of this thread could have been avoided!!!!!!!!!!!