A hero is sometimes used to describe the final product of a photo shoot or any creative project. The "hero" is the final image to be used that has been agreed upon by the art director, photographer and client or whichever single person has the big dick for the day.
Jeff: Yes sir. I think thats the Hero shot.
Graham: Fucken A man that was a bitch to get but it sure was worth it.
Jeff: Hell yeah man. Looken good!
Graham: Feelin good!