Participants made their own hand-held camera obscura and photograms Saturday during an event Saturday at the Sordoni Art Gallery in Wilkes-Barre that explored the science behind photography. The camera obscura is the ancestor of the modern-day camera. With this simple device, you can see how light bends and can create images. Photograms were created by field scientists using cyanotypes to capture the likeness of different specimens, like types of plants. These distinctive blue prints are one of the oldest photographic printing processes in the history of photography.