World's sharpest 400-speed B&W film. World's finest-grained 400-speed B&W film. Additional speed for low light and fast action. Pushability up to EI 1600. Maintains subject detail in prints at higher degrees of magnification than conventional films. Kodak T-Max 400 Professional film is a continuous-tone panchromatic black-and-white negative film. It is also useful for scientific and biomedical work, especially when fluorescence photography is required.