Over tyhe years, I have seen two accessory or add-on focal plane shutters designed for an 8x10 view cameras. These were roller blind type muchn like the later press cameras. I think Folmer and Schwing did that around 1900 or so.

Has anyone here ever don a DIY project to create something like that for a 4x5 using a Speed Graphic as a donor?

Maybe adapting/creating something as a reducing back on a 5x7 would work.

Would give exposure flexibility when working with antique Petzval or other barrel lenses over using a Packard or Tthornton shutter while preserving a period look.

Parts cameras come up from time to time.