Foma Fomapan 400 Action Professional is a panchromatically sensitized, black-and-white negative 35mm film designed for taking photographs under unfavorable light conditions or using short exposure times. The film meets high requirements for low granularity, good resolving power, and good contour sharpness. FOMAPAN 400 Action has a nominal speed rating of ISO 400/27o, but due to its wide exposure latitude, the film gives good results even when overexposed by 1 EV (exposure value) (as ISO 200) or underexposed by 2 EV (as ISO 1600) without any change in processing, i.e. without lengthening the development time or increasing the temperature of the developer used.