Snook is 100% right.
I don't know about the actual photography on ANTM, but man, they sure retouch the hell out of those shots for when they display the "best shot" on the LCD during the judging segment... which is when Tyra and the other two or three people judge the shot (the photographer, the outrageously gay black man, and some old washed up snobby woman who may or may not have had an enormous amount of plastic surgery which usually ends up giving you nightmares).