Ernst Haas belonged to the best known, most productive and widely published photographers of the twentieth century. Most commonly associated with vibrant colour photography, Haas was famed for his commercial work. It is undoubtedly however his other, private work that really illuminates the power of his sensibility and his true mastery. Unfortunately this side of his creative output has been kept private and thus escaped posthumous appreciation. It is only now, with the efforts and belief in Haas’ ability of a few, for the most part that of William Ewing, former Director of the Musée de l'Elysée in Lausanne, that this body of work is finally revealed and justly let’s this artist’s aptitude shine. The exhibition Color Correction, and Ewing’s corresponding book published by Steidl, uncovers, with an exciting and novel view, the “other” side of Ernst Haas’ visionary.