Complex sentence: He was reportedly the best cameraman in Denmark in the 1910s, when he made many films for August Bloom from 1911-16 and then for Benjamin Christensen and created the unique "images of Haxan".
Split into simpler sentences: He was reportedly the best cameraman in Denmark in the 1910s, making many films for August Bloom from 1911 until 1916 and then for Benjamin Christensen. He created the unique "images of Haxan".