'The question of meaning is the first you must ask yourself, even before taking out your camera': Jean-François Leroy, director of Visa pour l'image, pens letter to young photojournalists

In a book to be published in September, the co-founder and head of the international photojournalism festival in Perpignan, who died on August 31, addresses a letter to young photojournalists, urging them to approach their subjects with a journalistic rather than an aesthetic eye, and to learn from