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. 

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

 I’m glad there is a queer, out, dyke artist that’s being called an American photographer. 

Paul Outerbridge
[Photographer, b. 1896, New York, d. 1958, Laguna Beach, California.]

 The business of the state trying to legislate modesty is relatively both an infantile and ridiculous procedure. Of course, it is true that the more things are secreted the more intriguing they become, because it is always the forbidden that has the strongest appeal. Nudity is a state of fact—lewdity a state of mind. 

Roman Opalka
[Artist, b. 1931, Hocquincourt, France, d. 2011, Rome.]

 Art has a lot in common with madness. After all, why should one get involved with art? You can live normally like everyone else—which is to say, as stupidly as everyone else. 

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.) 

Ruth Orkin
[Photographer, b. 1921, Boston, Massachusetts, d. 1985, New York.]

 To be a photojournalist takes experience, skill, endurance, energy, salesmanship, organization, wheedling, climbing, gatecrashing, etc. – plus an eye and patience. 

Craig Owens
[Writer and critic, b. 1950, d. 1990.]

 Representation, then, is not—nor can it be—neutral; it is an act—indeed the founding act—of power in our culture. 

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

 We normally consider stability to be the constant in life and accidents to be the exception, but it’s exactly the opposite. In reality, the accident is the rule and stability is the exception.