Cracker of a lens.
In November 2017, Canon introduced a triad of manual focus Tilt-Shift lenses in focal lengths of 50mm, 90mm, and 135mm, all with 1:2 Macro capability. The TS-E 50L seems most suited to the subject matter I work with, deployable in a variety of situations in Landscape, Portraiture and Street.
For a review of this outstanding optic, go here.
PS: There is an iPhone app that enables interactive calculation of the Tilt angle in the field.