I'm afraid your answer is too short for me to understand.
What I mean is something like the pics shown here:
https://webuser.hs-furtwangen.de/~de...Panoramas.html
In my simple words:
How would a scene look like if not taken with a wide angle lens but with telephoto?
Of course it would be a kind of "artifical" result (due to hidden/ unrevealing effects).
In image manipulation I do have the "panorama tools" (as plugin).
Changing the FOV changes a grid to a kind of spherical projection (and vice versa).
You do find me confused.