 *Lightroom, actually; just a matter of finding a distortion correction profile for that lens (or, as it turned out, closest approximation as my version of Lightroom doesn't actually have a profile for said lens) and tweaking it to be straight. Almost wholely automated  :I'm currently GA reviewing Denmark Street, but I should hopefully have time in the next few weeks... (though I really should try and help Jim with his German ornithologist as I promised, at least take a break from tweaking photographs to add a bit). —   