Auguste Rodin
[Artist, b. 1840, Paris, France, d. 1917, Paris.]
It is the artist who is truthful and photography which lies, for in reality time does not stop, and if the artist succeeds in producing the impression of a movement which takes several moments for accomplishment, his work is certainly much less conventional than the scientific image, where time is abruptly suspended. 
W.H. Auden
[Poet and writer, b. 1907, York, North Yorkshire, England, d. 1973, Vienna, Austria.]
The steady eyes of the crow and the camera’s candid eyeSee as honestly as they know how, but they lie.
Edmundo Desnoes
[Writer, b. 1930, Havana, Cuba, lives in New York.]
...photography can lie as convincingly as literature or painting. The angle, the selected content, the assumed context. Joan Fontcuberta
[Photographer, b. 1955, Barcelona, lives in Barcelona.]
Every photograph is a fiction with pretensions to truth. Despite everything that we have been inculcated, all that we believe, photography always lies; it lies instinctively, lies because its nature does not allow it to do anything else. Wright Morris
[Writer and photographer, b. 1910, Central City, Nebraska, d. 1998, Mill Valley, California.]
However much [photographs] may lie, they do so with the raw materials of truth. Thomas Struth
[Photographer, b. 1954, Geldern, Germany, lives in Dusseldorf.]
In certain cases, I asked people to stay fixed in their position, but the effect was already lost. Those photographs don’t work, because photography is so sensitive a medium that one can’t lie using it. (On his “Museum Photographs”) Henry Adams
[Writer and historian, b. 1838, Boston, Massachusetts, d. 1918, Washington, D.C..]
I hate photographs abstractly, because they have given me more ideas perversely and immovably wrong, than I ever should get by imagination. Wolfgang Tillmans
[Photographer, b. 1968, Remscheid, Germany, lives in London.]
The true authenticity of photographs for me is that they usually manipulate and lie about what is in front of the camera, but never lie about the intentions behind the camera.