Medium sensitivity ISO 100. Excellent image quality, precise reproduction. Core-shell crystal technology ensures sharpness and grain-free results. The Ilford Delta 100 Professional is simply the best in its class - it offers photographers an exceptionally fine grain and sharpness that is rarely seen. Outstanding detail sharpness and the most precise image reproduction characterize this film. It provides excellent image quality at the recommended rating of ISO 100/21 and delivers outstanding results even at ISO 50 to 200.