Kodak professional 400 t max film is a continuous tone panchromatic black and white film for general pictorial use and it is especially useful for dimly lighted subjects fast shutter speeds for extended flash range and good depth of field it features fast speed iso 400 extremely fine grain and high resolving power it is a good film to push processes with shorter push processing development time no increase for 1 stop push shorter 2 stop push times than other films require