Rollei Retro 400S 135-36 The Rollei Retro 400S is a panchromatic black and white film with a high ISO 400 / 27º. This film is perfect for both everyday amateur photography and professional work. Excellent quality allows you to print photos taken with this tape and maintain excellent detail, contrast and sharpness of edges. Specifications: Type Black Format 35 mm Sensitivity ISO 400 / 27º Number of shots 36 shots.