In 1865, Ferrez opened his own studio at Rua São José, in the center of Rio de Janeiro. He was made "Photographo da Marinha Imperial" and his work with images increased through his life. He photographed Brazil from south to north, but paid more attention to his home city, Rio de Janeiro. His masterpieces are the great albums of railway constructions and the great panoramic views of the city of Rio de Janeiro and its quick development.