Per chi vuole approfondire ulteriormente sul film, qui si parla del ruolo di John Cowan quale ispiratore del personaggio di Thomas nel film (il fotografo).
Antonioni potrebbe averlo visto lavorare proprio in quel modo, fluido e spontaneo :
"The David Hemmings–and-Veruschka scene for Blow-Up was pure Cowan. Antonioni must have seen him working—I never saw anyone else take pictures quite that way. The shooting on the floor downwards, completely fluid, unhindered by tripods, etc., was typical Cowan."