At his grandfather’s funeral in 2021, Victor Belmondo described the legendary nouvelle vague star as an ‘eternal sun’. Now beginning to light up the screen himself, he talks about trying to capture his predecessor’s famous insouciance

Francois Truffaut sharing a cigarette with a choirboy, Jean Seberg nervously biting her nails, and a topless Jean-Paul Belmondo … Raymond Cauchetier was there with his Rolleiflex. The veteran photographer shares his secrets from the birth of 1960s cool