Ilford FP4 Plus is a fine-grained medium contrast panchromatic emulsion. Nominally rated at ISO 125/22, it yields very fine grain and outstanding sharpness with very high acutance.Ilford FP4 Plus has good exposure latitude making it very suitable for most photographic subjects under a variety of lighting conditions. The balance of sensitivity, grain and sharpness make Ilford FP4 Plus the most popular medium speed film.