Carl Theodor Dreyer on the set of The Passion of Joan of Arc (1928).
Check out FW Murnau on set of Faust in 1926 here
Le Corbusier, Sergei Eisenstein, and architect Andrei Burov in Moscow (1928).
I am not the author of this image.
Check out Sergei Eisenstein & Charlie Chaplin ‘playing’ Tennis here