More DoF fun

It is a wet dismal day here, so back to an indoor shot!   In this image I photographed this sheet of stamps at f1.4, f2.8, f5.6 and f11.  The image you see was taken at f2.8.  At f1.4 the depth of field was just too shallow for what I was looking for.  I focused on the crest bottom right on the sheet.  So you can see how the focus falls away.

The stamps depict the RRS Sir David Attenborough's maiden voyage and the stamps were released on 22 December 2022.  You may recall that the ship was almost named Boaty McBoatface, but I understand that the ship's onboard submersible submarine now bears that name!