Dennis Oppenheim
[Artist, b. 1938, Electric City, Washington, d. 2011, New York.]

 You can’t understand how strange it was to be a sculptor who exhibited photographs. (On exhibitions of his “earthworks” and land art pieces.) 

Timothy O'Sullivan
[Photographer, b. 1840, Ireland or New York (disputed), d. 1882, Staten Island, New York.]

 The battle of Bull Run would have been photographed “close up” but for the fact that a shell from one of the rebel field-pieces took away the photographer’s camera. 

Michael Ondaatje
[Writer, b. 1943, Colombo, Ceylon (now Sri Lanka), lives in Toronto, Canada.]

 You can see that the care he took defiling the beauty he had forced in them was as precise and clean as his good hands which at night had developed the negatives, floating the sheets in the correct acids and watching the faces and breasts and pubic triangles and sofas emerge. The making and destroying coming from the same source, same lust, same surgery his brain was capable of. (On New Orleans photographer E. J. Bellocq) 

Catherine Opie
[Photographer, b. 1961, Sandusky, Ohio, lives in Los Angeles.]

 Language is a very complicated thing, and that’s one of the reasons why I like making photographs. 

Georgia O'Keeffe
[Artist, b. 1887, Sun Prairie, Wisconsin, d. 1986, Santa Fe, New Mexico.]

 If they had known what a close relationship he would have needed to photograph [them] the way he photographed me—I think they wouldn’t have been interested. (On men who wanted Alfred Stieglitz to photograph their wives or girlfriends, 1922.) 

Bill Owens
[Photographer, b. 1938, San Jose, California, lives in Hayward, California.]

 The kind of photographs I do are not pretty pictures for the walls of your home, but instead say something about the walls of your home. 

George Orwell (Eric Arthur Blair)
[Writer, b. 1903, Motihari, Bengal, India, d. 1950, London.]

 It was true that there was no such person as Comrade Oglivy, but a few lines of print and a couple of faked photographs would soon bring him into existence... Comrade Oglivy, who had never existed in the present, now existed in the past, and when once the act of forgery was forgotten, he would exist just as authentically, and upon the same evidence, as Charlemagne or Julius Caesar. 

Gabriel Orozco
[Artist, b. 1962, Jalapa, Veracruz, Mexico, lives in New York, Paris, and Mexico City.]

 Photography is more than a window for me. Photography is more like a “space” that tries to capture situations.