The Pentax Program Plus uses the series of K-mount lenses that are compatible with all Pentax SLR cameras. The film used by this camera is 35mm, which is a popular format for both amateur and professional photographers. This type of film offers great flexibility in terms of shutter speed, aperture, and depth of field control to capture stunning images. Additionally, the Pentax Program Plus also has an array of features such as auto exposure modes and multiple exposure capability to help you get creative with your photography.