I wrote to Ilford, inquiring about the possibility of creating their wonderful (IMO) Pan F+ in a 4x5 size. In short, the answer was no, but here is their response for those that might be interested: I'm afraid that there is no chance that Pan F+ will be produced in sheet film sizes. There are technical difficulties with applying this emulsion to the sheet film base, and there is not enough demand to warrent the research required to make the needed changes. Regards, David Carper ILFORD Technical Service So that's it. I half expected to get a letter from some sales rep suggesting I use their Delta 100 Sheet film because the grain was "comparable". I was pleasantly surprised that I received a very honest and straightforward response to my question. yay Ilford!