Of course within the Hubble Deep Field we're seeing a succession of square images, beginning from very tiny (grain of sand at arm's length size) to enormous (millions of light years across) at the distant end.
I wrote: “within the Hubble Deep Field we’re seeing a succession of square images, beginning from very tiny (grain of sand at arm’s length size) to enormous (millions of light years across) at the distant end.”
What I should have said was that the Hubble Deep Field images can be viewed as a succession of planes, each at a different distance.