Ilford Delta 400 Professional Black and White Negative Film (35mm Roll Film, 100' Roll)Ilford's Delta 400 Professional is a high speed black and white negative film featuring core shell crystal technology in order to produce high sharpness with a fine, uniform grain structure. It has a nominal sensitivity of ISO 400 27 when developed in standard black and white chemistry, making it well suited to handheld photography and working in difficult lighting conditions. This versatile film also features a broad tonal range and a wide exposure