The Characteristic CurveThe Perfect “Curve”A Bad CameraOverexposureUnderexposureA Real CCDUsing Every ResourceWhite-on-WhiteExposing White-on-White ScenesLighting White-on-White ScenesSubject and BackgroundUsing an Opaque White BackgroundUsing a Translucent White BackgroundUsing a Mirror BackgroundIn Any Case, Keep the Background SmallBlack-on-BlackExposing Black-on-Black ScenesLighting Black-on-Black ScenesSubject and BackgroundUsing an Opaque Black BackgroundUsing a Glossy Black SurfaceKeep the Subject away from the BackgroundThe HistogramPreventing ProblemsOvermanipulationCurvesNew Principles?