Look closely at the actors and actresses in early motion pictures. Often the white powder makeup they used did not get applied too close to their eyes and the result can be quite comical in close-ups. Fortunately, current photographic materials extend well past the approximately 500 nanometer upper limit of early day imaging. There are many applications for the selective use of this spectrum. Specific characteristics of a subject can be emphasized or selected out by limiting the range of spectrum used to create an image.
Colored filters are the primary tool for selective use of spectrum with conventional photography.
Digital image editors open up some new possibilities for the creative use of spectral selectivity. The topics linked below provide an introduction to spectral selectivity, some technical information for making use of it and a few typical applications. Design by Ulla Zang .