Maspons joined the Agrupació Fotogràfica de Catalunya in 1951. In 1955 he moved to Paris, where he frequented photographic circles. On his return to Barcelona, he turned professional and formed a partnership with Julio Ubiña. He devoted himself to reportage, portraiture, fashion and advertising. He worked for 'La Gaceta ilustrada', 'Oeil', 'Paris-Match', 'Boccaccio', 'Expression', 'Elle', etc. He published a large number of books, amongst which the most outstanding were the ones published by Lumen in its collection 'Palabra e Imagen': 'Toreo de salón', with Julio Ubiña and with text by Camilo José Cela; 'La caza de la perdiz roja', with text by Miguel Delibes, and 'Poeta en Nueva York', on poems by Lorca.