Salgado, Dorothea Lange, WES, Elliott Gould, Sammy Davis Jr., Ansel Adams (at least once when doing some "street shooting" with Dorothea Lange), all come quickly to mind. Are they more famous than the Beatles? Well, that might depend on who you are and what your age is. There's a whole generation (and then some) who are unfamiliar with the Beatles (as a group), many of which know of these great photographers, entertainers and celebs.
Shel > [Original Message] > From: William Robb > > Are there any more famous Pentax users than the Beatles? > > Herb Ritts used to use a 6x7. Don't know if he still does.