This listing is for a propack (5 rolls) of medium format film. KODAK EKTACHROME Film has a distinctive look that was the choice for generations of photographers and cinematographers. The film is known for its extremely fine grain, clean colors, great tones and contrasts. Ektachrome is a color positive film and must be processed with E6 chemicals for normal processing. If you do process in C41 chemicals, that is cross-processing and you should consult with your lab.