On Tuesday, 23 January 2018 23:53:21 UTC-5, nospam wrote: > In article<email@example.com>, > RichA<firstname.lastname@example.org> wrote: > > > I lost this software in a hard drive crash years ago. What it did was allow > > a characterization of vignetting of a lens. I can't find the program now. > > you would have been able to if you backed up. The sky is blue too.