Rollei Infared 400 ISO Black & White Film, 35mm, 36 Exposure Rollei Infrared is well suited for experimental, creative applications and for scientific photography This film has a sensitivity up to 820 nm and and ISO of 400 without filtering Perfect exposures can be reached, using special infrared filters, leading into results with an unusual tonal range Special AURA effects can be obtained by overexposing film It has high constrast, very fine grain and excellent sharpness and is especially suited for scanning