Diaphragm (optics) photographic lens is called an iris diaphragm. In the early years of photography, a lens could be fitted with one of a set of interchangeable diaphragms , often as brass strips known as Waterhouse stops or Waterhouse diaphragms. The iris diaphragm in most modern still and video cameras is adjusted by movable blades, simulating the iris of the eye. The diaphragm has two to twenty blades (with most lenses today featuring between five and ten blades), depending on price and quality of the device in which it is used. Straight blades result in polygon shape of the diaphragm opening, while
She Has a Name six years. The drama centers on Jason's infiltration of a brothel ring that is trafficking girls into Bangkok. Jason comes to believe that Number 18 could be a key witness to a human trafficking incident and tries to gain her trust and persuade her to testify against the ring. The victimized child in the play is known only by the number 18 to reflect how traffickers often dehumanize their victims by giving them a new name or simply a number, which in some cases is branded onto the victim's body. Waldschmidt said he hoped that "She Has a Name" will